在 Java 中克隆 HashMap
java 8object oriented programmingprogramming
使用 clone() 方法克隆 HashMap。
以下是我们的 HashMap，元素为 −
HashMap hm1 = new HashMap();
hm1.put("Shirts", new Integer(700));
hm1.put("Trousers", new Integer(600));
hm1.put("Jeans", new Integer(1200));
hm1.put("Android TV", new Integer(450));
hm1.put("Air Purifiers", new Integer(300));
hm1.put("Food Processors", new Integer(950));
创建另一个 HashMap 并将第一个 HashMap 克隆到其中 −
HashMap hm2 = (HashMap)hm1.clone();
以下是在 Java 中克隆 HashMap 的示例 −
示例
import java.util.*;
public class Demo {
public static void main(String args[]) {
// Create hash map
HashMap hm1 = new HashMap();
hm1.put("Shirts", new Integer(700));
hm1.put("Trousers", new Integer(600));
hm1.put("Jeans", new Integer(1200));
hm1.put("Android TV", new Integer(450));
hm1.put("Air Purifiers", new Integer(300));
hm1.put("Food Processors", new Integer(950));
System.out.println("Map 1 = "+hm1);
HashMap hm2 = (HashMap)hm1.clone();
System.out.println("Cloned Map = "+hm2);
}
}
输出
Map 1 = {Backpack=1200, Belt=600, Wallet=700}
Cloned Map = {Backpack=1200, Belt=600, Wallet=700}
