Java HashMap clone()方法
java.util.HashMap.clone() 用于返回此HashMap实例的浅表副本:键和值本身不会被克隆。
1 语法
public Object clone()
2 参数
无
3 返回值
返回此映射的浅表副本。
4 示例
package com.yiidian;
/**
* 一点教程网: http://www.yiidian.com
*/
/**
* java.util.HashMap.clone()方法的例子
*/
import java.util.*;
public class Demo {
public static void main(String args[]) {
// create two hash maps
HashMap newmap1 = new HashMap();
HashMap newmap2 = new HashMap();
// populate 1st map
newmap1.put(1, "tutorials");
newmap1.put(2, "point");
newmap1.put(3, "is best");
// clone 1st map
newmap2 = (HashMap)newmap1.clone();
System.out.println("1st Map: " + newmap1);
System.out.println("Cloned 2nd Map: " + newmap2);
}
}
输出结果为:
1st Map: {1=tutorials, 2=point, 3=is best}
Cloned 2nd Map: {1=tutorials, 2=point, 3=is best}
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