failfast.java

Java编程思想 第九课 全源码

//: c09:FailFast.java
// From 'Thinking in Java, 2nd ed.' by Bruce Eckel
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
// Demonstrates the "fail fast" behavior.
import java.util.*;

public class FailFast {
  public static void main(String[] args) {
    Collection c = new ArrayList();
    Iterator it = c.iterator();
    c.add("An object");
    // Causes an exception:
    String s = (String)it.next();
  }
} ///:~