treesettest.java

《Java核心技术应用开发》电子工业出版社书籍源代码

/**
 * TreeSetTest.java
 */
package sample;
import java.util.*;

public class TreeSetTest {
  public static void main(String[] args) {
    //Set c = new TreeSet();
    Set c = new TreeSet((new TreeSetTest()).new MyComparator());
    //for(int i = 0; i < 10; i++)
    //  c.add(new Integer(i));
    c.add(new Integer(2));    c.add(new Integer(4));    c.add(new Integer(6));
    c.add(new Integer(1));    c.add(new Integer(5));    c.add(new Integer(3));
    Iterator it = c.iterator();
    while(it.hasNext())
      System.out.println(it.next());
  }

class MyComparator implements Comparator {
  public int compare(Object o1, Object o2) {
    int j1 = ((Integer)o1).intValue();
    int j2 = ((Integer)o2).intValue();
    return (j1 < j2 ? 1 : (j1 == j2 ? 0 : -1));
  }
}
}