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Map_Dup.java
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37 lines (33 loc) · 930 Bytes
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package _Test;
import java.util.HashMap;
import java.util.Map;
public class Map_Dup {
public static class Node {
int val;
String name;
public Node(int v, String n) {
val = v;
name =n;
}
}
public static void main(String[] args) {
Map<Integer, Integer> map = new HashMap();
map.put(1,1);
map.put(1,2);
map.put(2,2);
map.put(2,3);
for(int num : map.keySet()) {
System.out.println(map.get(num));
}
Map<Node, Integer> map1 = new HashMap<>();
Node node1 = new Node(1,"A");
Node node2 = new Node(1,"A");
Node node3 = new Node(1,"B");
map1.put(node1,node1.val);
map1.put(node2,node1.val);
map1.put(node3,node1.val);
for(Node node : map1.keySet()) {
System.out.println(node.name + ": " + map1.get(node));
}
}
}