failfast.java

来自「中文JAVA编程思想第二版,一本很好的JAVA入门书籍!」· Java 代码 · 共 15 行

//: 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();
  }
} ///:~