Java example source code file (Test.java)

This example Java source code file (Test.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

exception, test

The Test.java Java example source code

/*
 * Copyright (c) 2006, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

/*
 * @test
 * @bug 6431242
 * @run main Test
 */

public class Test{

  int    _len      = 8;
  int[]  _arr_i    = new int[_len];
  long[] _arr_l    = new long[_len];

  int[]  _arr_i_cp = new int [_len];
  long[] _arr_l_cp = new long [_len];

  int _k     = 0x12345678;
  int _j     = 0;
  int _ir    = 0x78563412;
  int _ir1   = 0x78563413;
  int _ir2   = 0x79563412;

  long _m    = 0x123456789abcdef0L;
  long _l    = 0L;
  long _lr   = 0xf0debc9a78563412L;
  long _lr1  = 0xf0debc9a78563413L;
  long _lr2  = 0xf1debc9a78563412L;

  void init() {
    for (int i=0; i<_arr_i.length; i++) {
      _arr_i[i] = _k;
      _arr_l[i] = _m;
    }
  }

  public int test_int_reversed(int i) {
    return Integer.reverseBytes(i);
  }

  public long test_long_reversed(long i) {
    return Long.reverseBytes(i);
  }

  public void test_copy_ints(int[] dst, int[] src) {
    for(int i=0; i<src.length; i++) {
      dst[i] = Integer.reverseBytes(src[i]);
    }
  }

  public void test_copy_ints_reversed(int[] dst, int[] src) {
    for (int i=0; i<src.length; i++) {
      dst[i] = 1 + Integer.reverseBytes(src[i]);
    }
  }

  public void test_copy_ints_store_reversed(int[] dst, int[] src) {
    for(int i=0; i<src.length; i++) {
      dst[i] = Integer.reverseBytes(1 + src[i]);
    }
  }

  public void test_copy_longs(long[] dst, long[] src) {
    for(int i=0; i<src.length; i++) {
      dst[i] = Long.reverseBytes(src[i]);
    }
  }

  public void test_copy_longs_reversed(long[] dst, long[] src) {
    for (int i=0; i<src.length; i++) {
      dst[i] = 1 + Long.reverseBytes(src[i]);
    }
  }

  public void test_copy_longs_store_reversed(long[] dst, long[] src) {
    for(int i=0; i<src.length; i++) {
      dst[i] = Long.reverseBytes(1 + src[i]);
    }
  }

  public void test() throws Exception {
    int up_limit=90000;


    //test single

    for (int loop=0; loop<up_limit; loop++) {
      _j = test_int_reversed(_k);
      if (_j != _ir ) {
        throw new Exception("Interger.reverseBytes failed " + _j + " iter " + loop);
      }
      _l = test_long_reversed(_m);
      if (_l != _lr ) {
        throw new Exception("Long.reverseBytes failed " + _l + " iter " + loop);
      }
    }

    // test scalar load/store
    for (int loop=0; loop<up_limit; loop++) {

      test_copy_ints(_arr_i_cp, _arr_i);
      for (int j=0; j< _arr_i.length; j++) {
        if (_arr_i_cp[j] != _ir) {
          throw new Exception("Interger.reverseBytes failed test_copy_ints iter " + loop);
        }
      }

      test_copy_ints_reversed(_arr_i_cp, _arr_i);
      for (int j=0; j< _arr_i.length; j++) {
        if (_arr_i_cp[j] != _ir1) {
          throw new Exception("Interger.reverseBytes failed test_copy_ints_reversed iter " + loop);
        }
      }
      test_copy_ints_store_reversed(_arr_i_cp, _arr_i);
      for (int j=0; j< _arr_i.length; j++) {
        if (_arr_i_cp[j] != _ir2) {
          throw new Exception("Interger.reverseBytes failed test_copy_ints_store_reversed iter " + loop);
        }
      }

      test_copy_longs(_arr_l_cp, _arr_l);
      for (int j=0; j< _arr_i.length; j++) {
        if (_arr_l_cp[j] != _lr) {
          throw new Exception("Long.reverseBytes failed test_copy_longs iter " + loop);
        }
      }
      test_copy_longs_reversed(_arr_l_cp, _arr_l);
      for (int j=0; j< _arr_i.length; j++) {
        if (_arr_l_cp[j] != _lr1) {
          throw new Exception("Long.reverseBytes failed test_copy_longs_reversed iter " + loop);
        }
      }
      test_copy_longs_store_reversed(_arr_l_cp, _arr_l);
      for (int j=0; j< _arr_i.length; j++) {
        if (_arr_l_cp[j] != _lr2) {
          throw new Exception("Long.reverseBytes failed test_copy_longs_store_reversed iter " + loop);
        }
      }

    }
  }

  public static void main(String args[]) {
    try {
      Test t = new Test();
      t.init();
      t.test();
      System.out.println("Passed");
    }catch (Exception e) {
      e.printStackTrace();
      System.out.println("Failed");
    }
  }
}