finallyworks.java

java的异常部分ppt

//: c10:FinallyWorks.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// The finally clause is always executed.

class ThreeException extends Exception {}

public class FinallyWorks {
  static int count = 0;
  public static void main(String[] args) {
    while(true) {
      try {
        // Post-increment is zero first time:
        if(count++ == 0)
          throw new ThreeException();
        System.out.println("No exception");
      } catch(ThreeException e) {
        System.err.println("ThreeException");
      } finally {
        System.err.println("In finally clause");
        if(count == 2) break; // out of "while"
      }
    }
  }
} ///:~