TestThrow.java

/*
 *  This file is part of the Jikes RVM project (http://jikesrvm.org).
 *
 *  This file is licensed to You under the Eclipse Public License (EPL);
 *  You may not use this file except in compliance with the License. You
 *  may obtain a copy of the License at
 *
 *      http://www.opensource.org/licenses/eclipse-1.0.php
 *
 *  See the COPYRIGHT.txt file distributed with this work for information
 *  regarding copyright ownership.
 */
import java.io.FileInputStream;
import java.io.IOException;

class MyErrorBase extends Throwable { }

class MyError extends MyErrorBase { }

class NotMyError extends Throwable { }

class TestThrow {
   public static void main(String[] args) throws Throwable {
      run();
   }

   public static void run() throws Throwable {
      System.out.println("TestThrow");

      // test "user" exceptions
      try {
         int a = 1;
         int b = 2;
         int c = a + b * foo();
         System.out.println(c);
      } catch (MyErrorBase  e) {
         System.out.println("caught: " + e);
      }

      // test "vm" exceptions
      try {
         FileInputStream s = new FileInputStream("xyzzy");
         System.out.println(s);
      } catch (IOException e) {
         System.out.println("caught: " + e.getClass());
         }
      }

   static int foo() throws MyError,NotMyError {
      if (true) {
        throw new MyError();
      } else {
        throw new NotMyError();
      }
   }

   static int bar() {
      int i = 1;
      int j = 0;
      return i / j;
   }
}