从Java中的HashMap检索一组Map.Entry元素
创建一个HashMap并添加元素-
HashMap hm = new HashMap();
hm.put("Wallet", new Integer(700));
hm.put("Belt", new Integer(600));
hm.put("Backpack", new Integer(1200));以下是用于检索一组Map.Entry元素的代码段-
Set s = hm.entrySet();
Iterator iter = s.iterator();
System.out.println("\nKey\tValue");
while (iter.hasNext()) {
Map.Entry e = (Map.Entry) iter.next();
System.out.println(e.getKey() + " " + e.getValue());
}以下是从HashMap检索一组Map.Entry元素的示例-
示例
import java.util.*;
public class Demo {
public static void main(String args[]) {
//创建哈希映射
HashMap hm = new HashMap();
hm.put("Wallet", new Integer(700));
hm.put("Belt", new Integer(600));
hm.put("Backpack", new Integer(1200));
System.out.println("Map = "+hm);
Set s = hm.entrySet();
Iterator iter = s.iterator();
System.out.println("\nKey\tValue");
while (iter.hasNext()) {
Map.Entry e = (Map.Entry) iter.next();
System.out.println(e.getKey() + " " + e.getValue());
}
}
}输出结果
Map = {Backpack=1200, Belt=600, Wallet=700}
KeyValue
Backpack 1200
Belt 600
Wallet 700热门推荐
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