test109.java

来自「想考ＳＣＪＰ国际认证的必看这文档」· Java 代码 · 共 11 行

import java.util.*;
class Test109 {
    public static void main(String[] args) {
	HashMap props = new HashMap();
	props.put("key45","some value");
	props.put("key12","some other");
	Set s = props.keySet();
	Collections.sort(s);
    }
}