test/SystemMethods/SystemMethods.java - platform/art - Gitiles

 /*
  * Copyright (C) 2011 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 import java.lang.reflect.*;
 import java.util.*;

 class SystemMethods {
   public static int test0() {
     System.logI("hello world");
     return 123;
   }

   public static int test1() {
     String[] digits = new String[] {
       "0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f",
     };
     long t = System.currentTimeMillis();
     for (int i = 7; i >= 0; --i) {
       int b = ((int) (t >> (i * 8))) & 0xff;
       System.logI(digits[(b >> 4) & 0xf]);
       System.logI(digits[b & 0xf]);
     }
     return 123;
   }

   private static String[] STRING_DIGITS = new String[] {
     "0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f",
   };

   public static int test2() {
     char[] cs = new char[20];
     long t = System.currentTimeMillis();
     StringBuilder sb = new StringBuilder(20);
     for (int i = 7; i >= 0; --i) {
       int b = ((int) (t >> (i * 8))) & 0xff;
       sb.append(STRING_DIGITS[(b >> 4) & 0xf]);
       sb.append(STRING_DIGITS[b & 0xf]);
     }
     String result = sb.toString();
     System.logI(result);
     return 123;
   }

   private static char[] DIGITS = new char[] {
     '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
     'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
     'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
     'u', 'v', 'w', 'x', 'y', 'z'
   };

   public static int test3() {
     long t = System.currentTimeMillis();

     long v = t;
     //        int i = (int) v;
     //        if (v >= 0 && i == v) {
     //            return intToHexString(i, false, 0);
     //        }

     int bufLen = 16;  // Max number of hex digits in a long
     char[] buf = new char[bufLen];
     int cursor = bufLen;

     do {
       buf[--cursor] = DIGITS[((int) v) & 0xF];
     } while ((v >>>= 4) != 0);

     String s = new String(buf, cursor, bufLen - cursor);
     System.logI(s);

     System.logI(IntegralToString.longToHexString(t));
     System.logI(Long.toHexString(t));
     System.logI(Long.toString(t));
     return 123;
   }

   private static boolean z = true;
   private static byte b = 8;
   private static char c = 'x';
   private static double d = Math.PI;
   private static float f = 3.14f;
   private static int i = 32;
   private static long j = 0x0123456789abcdefL;
   private static short s = 16;

   public static int test4() {
     String s = "int=" + i + " long=" + j;
     System.logI(s);
     return 123;
   }

   public static int test5() throws Exception {
     System.logI("new Thread...");
     Thread t = new Thread(new Runnable() {
       public void run() {
         System.logI("hello from a new thread!");
         System.logI(Thread.currentThread().toString());
         try {
           System.logI("sleeping for 2s");
           Thread.sleep(2*1000);
         } catch (Exception ex) { ex.printStackTrace(); }
         System.logI("finished sleeping");
         throw new RuntimeException("uncaught exception");
       }
     });
     System.logI("calling Thread.toString...");
     System.logI(t.toString());
     System.logI("calling Thread.start...");
     t.start();
     //t.join();
     System.logI("...done!");
     return 123;
   }

   public static void test6() throws Exception {
     java.lang.reflect.Field f;

     f = SystemMethods.class.getDeclaredField("z");
     System.out.println(f.getBoolean(null));
     f = SystemMethods.class.getDeclaredField("b");
     System.out.println(f.getByte(null));
     f = SystemMethods.class.getDeclaredField("c");
     System.out.println(f.getChar(null));
     f = SystemMethods.class.getDeclaredField("d");
     System.out.println(f.getDouble(null));
     f = SystemMethods.class.getDeclaredField("f");
     System.out.println(f.getFloat(null));
     f = SystemMethods.class.getDeclaredField("i");
     System.out.println(f.getInt(null));
     f = SystemMethods.class.getDeclaredField("j");
     System.out.println(f.getLong(null));
     f = SystemMethods.class.getDeclaredField("s");
     System.out.println(f.getShort(null));

     f = SystemMethods.class.getDeclaredField("z");
     f.setBoolean(null, false);
     f = SystemMethods.class.getDeclaredField("b");
     f.setByte(null, (byte) 7);
     f = SystemMethods.class.getDeclaredField("c");
     f.setChar(null, 'y');
     f = SystemMethods.class.getDeclaredField("d");
     f.setDouble(null, 2.7);
     f = SystemMethods.class.getDeclaredField("f");
     f.setFloat(null, 2.7f);
     f = SystemMethods.class.getDeclaredField("i");
     f.setInt(null, 31);
     f = SystemMethods.class.getDeclaredField("j");
     f.setLong(null, 63);
     f = SystemMethods.class.getDeclaredField("s");
     f.setShort(null, (short) 15);

     f = SystemMethods.class.getDeclaredField("z");
     System.out.println(f.getBoolean(null));
     f = SystemMethods.class.getDeclaredField("b");
     System.out.println(f.getByte(null));
     f = SystemMethods.class.getDeclaredField("c");
     System.out.println(f.getChar(null));
     f = SystemMethods.class.getDeclaredField("d");
     System.out.println(f.getDouble(null));
     f = SystemMethods.class.getDeclaredField("f");
     System.out.println(f.getFloat(null));
     f = SystemMethods.class.getDeclaredField("i");
     System.out.println(f.getInt(null));
     f = SystemMethods.class.getDeclaredField("j");
     System.out.println(f.getLong(null));
     f = SystemMethods.class.getDeclaredField("s");
     System.out.println(f.getShort(null));

     f = SystemMethods.class.getDeclaredField("z");
     f.set(null, Boolean.valueOf(true));
     f = SystemMethods.class.getDeclaredField("b");
     f.set(null, Byte.valueOf((byte) 6));
     f = SystemMethods.class.getDeclaredField("c");
     f.set(null, Character.valueOf('z'));
     f = SystemMethods.class.getDeclaredField("d");
     f.set(null, Double.valueOf(1.3));
     f = SystemMethods.class.getDeclaredField("f");
     f.set(null, Float.valueOf(1.3f));
     f = SystemMethods.class.getDeclaredField("i");
     f.set(null, Integer.valueOf(30));
     f = SystemMethods.class.getDeclaredField("j");
     f.set(null, Long.valueOf(62));
     f.set(null, Integer.valueOf(62));
     f = SystemMethods.class.getDeclaredField("s");
     f.set(null, Short.valueOf((short) 14));

     f = SystemMethods.class.getDeclaredField("z");
     System.out.println(f.getBoolean(null));
     f = SystemMethods.class.getDeclaredField("b");
     System.out.println(f.getByte(null));
     f = SystemMethods.class.getDeclaredField("c");
     System.out.println(f.getChar(null));
     f = SystemMethods.class.getDeclaredField("d");
     System.out.println(f.getDouble(null));
     f = SystemMethods.class.getDeclaredField("f");
     System.out.println(f.getFloat(null));
     f = SystemMethods.class.getDeclaredField("i");
     System.out.println(f.getInt(null));
     f = SystemMethods.class.getDeclaredField("j");
     System.out.println(f.getLong(null));
     f = SystemMethods.class.getDeclaredField("s");
     System.out.println(f.getShort(null));

     try {
       f = SystemMethods.class.getDeclaredField("s");
       f.set(null, Integer.valueOf(14));
     } catch (Exception ex) {
       ex.printStackTrace();
     }

     f = SystemMethods.class.getDeclaredField("z");
     show(f.get(null));
     f = SystemMethods.class.getDeclaredField("b");
     show(f.get(null));
     f = SystemMethods.class.getDeclaredField("c");
     show(f.get(null));
     f = SystemMethods.class.getDeclaredField("d");
     show(f.get(null));
     f = SystemMethods.class.getDeclaredField("f");
     show(f.get(null));
     f = SystemMethods.class.getDeclaredField("i");
     show(f.get(null));
     f = SystemMethods.class.getDeclaredField("j");
     show(f.get(null));
     f = SystemMethods.class.getDeclaredField("s");
     show(f.get(null));

     /*
     private static boolean z = true;
     private static byte b = 8;
     private static char c = 'x';
     private static double d = Math.PI;
     private static float f = 3.14f;
     private static int i = 32;
     private static long j = 0x0123456789abcdefL;
     private static short s = 16;
     */
   }

   private static void show(Object o) {
     System.out.println(o + " (" + (o != null ? o.getClass() : "null") + ")");
   }

   public static void test7() throws Exception {
     System.out.println(Arrays.toString(String.class.getDeclaredConstructors()));
     System.out.println(Arrays.toString(String.class.getDeclaredFields()));
     System.out.println(Arrays.toString(String.class.getDeclaredMethods()));

     System.out.println(Arrays.toString(SystemMethods.class.getInterfaces()));
     System.out.println(Arrays.toString(String.class.getInterfaces()));

 //    System.out.println(SystemMethods.class.getModifiers());
 //    System.out.println(String.class.getModifiers());

     System.out.println(String.class.isAssignableFrom(Object.class));
     System.out.println(Object.class.isAssignableFrom(String.class));

     System.out.println(String.class.isInstance("hello"));
     System.out.println(String.class.isInstance(123));

     java.lang.reflect.Method m;

     m = SystemMethods.class.getDeclaredMethod("IV", int.class);
     System.out.println(Arrays.toString(m.getParameterTypes()));
     show(m.invoke(null, 4444));
     System.out.println(Arrays.toString(m.getParameterTypes()));

     m = SystemMethods.class.getDeclaredMethod("IIV", int.class, int.class);
     System.out.println(Arrays.toString(m.getParameterTypes()));
     show(m.invoke(null, 1111, 2222));

     m = SystemMethods.class.getDeclaredMethod("III", int.class, int.class);
     System.out.println(Arrays.toString(m.getParameterTypes()));
     show(m.invoke(null, 1111, 2222));

     m = SystemMethods.class.getDeclaredMethod("sumArray", int[].class);
     System.out.println(Arrays.toString(m.getParameterTypes()));
     show(m.invoke(null, new int[] { 1, 2, 3, 4 }));

     m = SystemMethods.class.getDeclaredMethod("concat", String[].class);
     System.out.println(Arrays.toString(m.getParameterTypes()));
     show(m.invoke(null, (Object) new String[] { "h", "e", "l", "l", "o" }));

     m = SystemMethods.class.getDeclaredMethod("ZBCDFIJSV", boolean.class, byte.class, char.class, double.class, float.class, int.class, long.class, short.class);
     System.out.println(Arrays.toString(m.getParameterTypes()));
     show(m.invoke(null, true, (byte) 0, '1', 2, 3, 4, 5, (short) 6));

     m = SystemMethods.class.getDeclaredMethod("ZBCDLFIJSV", boolean.class, byte.class, char.class, double.class, String.class, float.class, int.class, long.class, short.class);
     System.out.println(Arrays.toString(m.getParameterTypes()));
     show(m.invoke(null, true, (byte) 0, '1', 2, "hello world", 3, 4, 5, (short) 6));

     try {
       m = SystemMethods.class.getDeclaredMethod("thrower");
       System.out.println(Arrays.toString(m.getParameterTypes()));
       show(m.invoke(null));
       System.out.println("************* should have thrown!");
     } catch (Exception ex) {
       ex.printStackTrace();
     }
   }

   private static void thrower() {
     throw new ArithmeticException("surprise!");
   }

   public static int sumArray(int[] xs) {
     int result = 0;
     for (int x : xs) {
       result += x;
     }
     return result;
   }

   public static String concat(String[] strings) {
     String result = "";
     for (String s : strings) {
       result += s;
     }
     return result;
   }

   public static void IV(int i) {
     System.out.println(i);
   }

   public static void IIV(int i, int j) {
     System.out.println(i + " " + j);
   }

   public static int III(int i, int j) {
     System.out.println(i + " " + j);
     return i + j;
   }

   public static void ZBCDFIJSV(boolean z, byte b, char c, double d, float f, int i, long l, short s) {
     System.out.println(z + " " + b + " " + c + " " + d + " " + f + " " + i + " " + l + " " + s);
   }

   public static void ZBCDLFIJSV(boolean z, byte b, char c, double d, String string, float f, int i, long l, short s) {
     System.out.println(z + " " + b + " " + c + " " + d + " " + " " + string + " " + f + " " + i + " " + l + " " + s);
   }

   public static void test8() throws Exception {
     Constructor<?> ctor;

     ctor = String.class.getConstructor(new Class[0]);
     show(ctor.newInstance((Object[]) null));

     ctor = String.class.getConstructor(char[].class, int.class, int.class);
     show(ctor.newInstance(new char[] { 'x', 'y', 'z', '!' }, 1, 2));
   }

   public static void main(String[] args) throws Exception {
     test7();
     test8();
   }
 }
	/*
	* Copyright (C) 2011 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	import java.lang.reflect.*;
	import java.util.*;

	class SystemMethods {
	public static int test0() {
	System.logI("hello world");
	return 123;
	}

	public static int test1() {
	String[] digits = new String[] {
	"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f",
	};
	long t = System.currentTimeMillis();
	for (int i = 7; i >= 0; --i) {
	int b = ((int) (t >> (i * 8))) & 0xff;
	System.logI(digits[(b >> 4) & 0xf]);
	System.logI(digits[b & 0xf]);
	}
	return 123;
	}

	private static String[] STRING_DIGITS = new String[] {
	"0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f",
	};

	public static int test2() {
	char[] cs = new char[20];
	long t = System.currentTimeMillis();
	StringBuilder sb = new StringBuilder(20);
	for (int i = 7; i >= 0; --i) {
	int b = ((int) (t >> (i * 8))) & 0xff;
	sb.append(STRING_DIGITS[(b >> 4) & 0xf]);
	sb.append(STRING_DIGITS[b & 0xf]);
	}
	String result = sb.toString();
	System.logI(result);
	return 123;
	}

	private static char[] DIGITS = new char[] {
	'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
	'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
	'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
	'u', 'v', 'w', 'x', 'y', 'z'
	};

	public static int test3() {
	long t = System.currentTimeMillis();

	long v = t;
	// int i = (int) v;
	// if (v >= 0 && i == v) {
	// return intToHexString(i, false, 0);
	// }

	int bufLen = 16; // Max number of hex digits in a long
	char[] buf = new char[bufLen];
	int cursor = bufLen;

	do {
	buf[--cursor] = DIGITS[((int) v) & 0xF];
	} while ((v >>>= 4) != 0);

	String s = new String(buf, cursor, bufLen - cursor);
	System.logI(s);

	System.logI(IntegralToString.longToHexString(t));
	System.logI(Long.toHexString(t));
	System.logI(Long.toString(t));
	return 123;
	}

	private static boolean z = true;
	private static byte b = 8;
	private static char c = 'x';
	private static double d = Math.PI;
	private static float f = 3.14f;
	private static int i = 32;
	private static long j = 0x0123456789abcdefL;
	private static short s = 16;

	public static int test4() {
	String s = "int=" + i + " long=" + j;
	System.logI(s);
	return 123;
	}

	public static int test5() throws Exception {
	System.logI("new Thread...");
	Thread t = new Thread(new Runnable() {
	public void run() {
	System.logI("hello from a new thread!");
	System.logI(Thread.currentThread().toString());
	try {
	System.logI("sleeping for 2s");
	Thread.sleep(2*1000);
	} catch (Exception ex) { ex.printStackTrace(); }
	System.logI("finished sleeping");
	throw new RuntimeException("uncaught exception");
	}
	});
	System.logI("calling Thread.toString...");
	System.logI(t.toString());
	System.logI("calling Thread.start...");
	t.start();
	//t.join();
	System.logI("...done!");
	return 123;
	}

	public static void test6() throws Exception {
	java.lang.reflect.Field f;

	f = SystemMethods.class.getDeclaredField("z");
	System.out.println(f.getBoolean(null));
	f = SystemMethods.class.getDeclaredField("b");
	System.out.println(f.getByte(null));
	f = SystemMethods.class.getDeclaredField("c");
	System.out.println(f.getChar(null));
	f = SystemMethods.class.getDeclaredField("d");
	System.out.println(f.getDouble(null));
	f = SystemMethods.class.getDeclaredField("f");
	System.out.println(f.getFloat(null));
	f = SystemMethods.class.getDeclaredField("i");
	System.out.println(f.getInt(null));
	f = SystemMethods.class.getDeclaredField("j");
	System.out.println(f.getLong(null));
	f = SystemMethods.class.getDeclaredField("s");
	System.out.println(f.getShort(null));

	f = SystemMethods.class.getDeclaredField("z");
	f.setBoolean(null, false);
	f = SystemMethods.class.getDeclaredField("b");
	f.setByte(null, (byte) 7);
	f = SystemMethods.class.getDeclaredField("c");
	f.setChar(null, 'y');
	f = SystemMethods.class.getDeclaredField("d");
	f.setDouble(null, 2.7);
	f = SystemMethods.class.getDeclaredField("f");
	f.setFloat(null, 2.7f);
	f = SystemMethods.class.getDeclaredField("i");
	f.setInt(null, 31);
	f = SystemMethods.class.getDeclaredField("j");
	f.setLong(null, 63);
	f = SystemMethods.class.getDeclaredField("s");
	f.setShort(null, (short) 15);

	f = SystemMethods.class.getDeclaredField("z");
	System.out.println(f.getBoolean(null));
	f = SystemMethods.class.getDeclaredField("b");
	System.out.println(f.getByte(null));
	f = SystemMethods.class.getDeclaredField("c");
	System.out.println(f.getChar(null));
	f = SystemMethods.class.getDeclaredField("d");
	System.out.println(f.getDouble(null));
	f = SystemMethods.class.getDeclaredField("f");
	System.out.println(f.getFloat(null));
	f = SystemMethods.class.getDeclaredField("i");
	System.out.println(f.getInt(null));
	f = SystemMethods.class.getDeclaredField("j");
	System.out.println(f.getLong(null));
	f = SystemMethods.class.getDeclaredField("s");
	System.out.println(f.getShort(null));

	f = SystemMethods.class.getDeclaredField("z");
	f.set(null, Boolean.valueOf(true));
	f = SystemMethods.class.getDeclaredField("b");
	f.set(null, Byte.valueOf((byte) 6));
	f = SystemMethods.class.getDeclaredField("c");
	f.set(null, Character.valueOf('z'));
	f = SystemMethods.class.getDeclaredField("d");
	f.set(null, Double.valueOf(1.3));
	f = SystemMethods.class.getDeclaredField("f");
	f.set(null, Float.valueOf(1.3f));
	f = SystemMethods.class.getDeclaredField("i");
	f.set(null, Integer.valueOf(30));
	f = SystemMethods.class.getDeclaredField("j");
	f.set(null, Long.valueOf(62));
	f.set(null, Integer.valueOf(62));
	f = SystemMethods.class.getDeclaredField("s");
	f.set(null, Short.valueOf((short) 14));

	f = SystemMethods.class.getDeclaredField("z");
	System.out.println(f.getBoolean(null));
	f = SystemMethods.class.getDeclaredField("b");
	System.out.println(f.getByte(null));
	f = SystemMethods.class.getDeclaredField("c");
	System.out.println(f.getChar(null));
	f = SystemMethods.class.getDeclaredField("d");
	System.out.println(f.getDouble(null));
	f = SystemMethods.class.getDeclaredField("f");
	System.out.println(f.getFloat(null));
	f = SystemMethods.class.getDeclaredField("i");
	System.out.println(f.getInt(null));
	f = SystemMethods.class.getDeclaredField("j");
	System.out.println(f.getLong(null));
	f = SystemMethods.class.getDeclaredField("s");
	System.out.println(f.getShort(null));

	try {
	f = SystemMethods.class.getDeclaredField("s");
	f.set(null, Integer.valueOf(14));
	} catch (Exception ex) {
	ex.printStackTrace();
	}

	f = SystemMethods.class.getDeclaredField("z");
	show(f.get(null));
	f = SystemMethods.class.getDeclaredField("b");
	show(f.get(null));
	f = SystemMethods.class.getDeclaredField("c");
	show(f.get(null));
	f = SystemMethods.class.getDeclaredField("d");
	show(f.get(null));
	f = SystemMethods.class.getDeclaredField("f");
	show(f.get(null));
	f = SystemMethods.class.getDeclaredField("i");
	show(f.get(null));
	f = SystemMethods.class.getDeclaredField("j");
	show(f.get(null));
	f = SystemMethods.class.getDeclaredField("s");
	show(f.get(null));

	/*
	private static boolean z = true;
	private static byte b = 8;
	private static char c = 'x';
	private static double d = Math.PI;
	private static float f = 3.14f;
	private static int i = 32;
	private static long j = 0x0123456789abcdefL;
	private static short s = 16;
	*/
	}

	private static void show(Object o) {
	System.out.println(o + " (" + (o != null ? o.getClass() : "null") + ")");
	}

	public static void test7() throws Exception {
	System.out.println(Arrays.toString(String.class.getDeclaredConstructors()));
	System.out.println(Arrays.toString(String.class.getDeclaredFields()));
	System.out.println(Arrays.toString(String.class.getDeclaredMethods()));

	System.out.println(Arrays.toString(SystemMethods.class.getInterfaces()));
	System.out.println(Arrays.toString(String.class.getInterfaces()));

	// System.out.println(SystemMethods.class.getModifiers());
	// System.out.println(String.class.getModifiers());

	System.out.println(String.class.isAssignableFrom(Object.class));
	System.out.println(Object.class.isAssignableFrom(String.class));

	System.out.println(String.class.isInstance("hello"));
	System.out.println(String.class.isInstance(123));

	java.lang.reflect.Method m;

	m = SystemMethods.class.getDeclaredMethod("IV", int.class);
	System.out.println(Arrays.toString(m.getParameterTypes()));
	show(m.invoke(null, 4444));
	System.out.println(Arrays.toString(m.getParameterTypes()));

	m = SystemMethods.class.getDeclaredMethod("IIV", int.class, int.class);
	System.out.println(Arrays.toString(m.getParameterTypes()));
	show(m.invoke(null, 1111, 2222));

	m = SystemMethods.class.getDeclaredMethod("III", int.class, int.class);
	System.out.println(Arrays.toString(m.getParameterTypes()));
	show(m.invoke(null, 1111, 2222));

	m = SystemMethods.class.getDeclaredMethod("sumArray", int[].class);
	System.out.println(Arrays.toString(m.getParameterTypes()));
	show(m.invoke(null, new int[] { 1, 2, 3, 4 }));

	m = SystemMethods.class.getDeclaredMethod("concat", String[].class);
	System.out.println(Arrays.toString(m.getParameterTypes()));
	show(m.invoke(null, (Object) new String[] { "h", "e", "l", "l", "o" }));

	m = SystemMethods.class.getDeclaredMethod("ZBCDFIJSV", boolean.class, byte.class, char.class, double.class, float.class, int.class, long.class, short.class);
	System.out.println(Arrays.toString(m.getParameterTypes()));
	show(m.invoke(null, true, (byte) 0, '1', 2, 3, 4, 5, (short) 6));

	m = SystemMethods.class.getDeclaredMethod("ZBCDLFIJSV", boolean.class, byte.class, char.class, double.class, String.class, float.class, int.class, long.class, short.class);
	System.out.println(Arrays.toString(m.getParameterTypes()));
	show(m.invoke(null, true, (byte) 0, '1', 2, "hello world", 3, 4, 5, (short) 6));

	try {
	m = SystemMethods.class.getDeclaredMethod("thrower");
	System.out.println(Arrays.toString(m.getParameterTypes()));
	show(m.invoke(null));
	System.out.println("************* should have thrown!");
	} catch (Exception ex) {
	ex.printStackTrace();
	}
	}

	private static void thrower() {
	throw new ArithmeticException("surprise!");
	}

	public static int sumArray(int[] xs) {
	int result = 0;
	for (int x : xs) {
	result += x;
	}
	return result;
	}

	public static String concat(String[] strings) {
	String result = "";
	for (String s : strings) {
	result += s;
	}
	return result;
	}

	public static void IV(int i) {
	System.out.println(i);
	}

	public static void IIV(int i, int j) {
	System.out.println(i + " " + j);
	}

	public static int III(int i, int j) {
	System.out.println(i + " " + j);
	return i + j;
	}

	public static void ZBCDFIJSV(boolean z, byte b, char c, double d, float f, int i, long l, short s) {
	System.out.println(z + " " + b + " " + c + " " + d + " " + f + " " + i + " " + l + " " + s);
	}

	public static void ZBCDLFIJSV(boolean z, byte b, char c, double d, String string, float f, int i, long l, short s) {
	System.out.println(z + " " + b + " " + c + " " + d + " " + " " + string + " " + f + " " + i + " " + l + " " + s);
	}

	public static void test8() throws Exception {
	Constructor<?> ctor;

	ctor = String.class.getConstructor(new Class[0]);
	show(ctor.newInstance((Object[]) null));

	ctor = String.class.getConstructor(char[].class, int.class, int.class);
	show(ctor.newInstance(new char[] { 'x', 'y', 'z', '!' }, 1, 2));
	}

	public static void main(String[] args) throws Exception {
	test7();
	test8();
	}
	}