new HashMap < K, V > () : HashMap « java.util « Java by API






new HashMap < K, V > ()

  
/**
 *Output: 
D: 99.22
A: 3434.34
C: 1378.0
B: 123.22
E: -19.08

B's new balance: 1123.22
 */

import java.util.HashMap;
import java.util.Map;
import java.util.Set;

public class MainClass {
  public static void main(String args[]) {

    HashMap<String, Double> hm = new HashMap<String, Double>();

    hm.put("A", new Double(3434.34));
    hm.put("B", new Double(123.22));
    hm.put("C", new Double(1378.00));
    hm.put("D", new Double(99.22));
    hm.put("E", new Double(-19.08));

    Set<Map.Entry<String, Double>> set = hm.entrySet();

    for (Map.Entry<String, Double> me : set) {
      System.out.print(me.getKey() + ": ");
      System.out.println(me.getValue());
    }

    System.out.println();

    double balance = hm.get("B");
    hm.put("B", balance + 1000);

    System.out.println("B's new balance: " + hm.get("B"));
  }
}

           
         
    
  








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2.HashMap: clone()
3.HashMap: containsKey(Object key)
4.HashMap: containsValue(Object value)
5.HashMap: entrySet()
6.HashMap: keySet()
7.HashMap: get(E o)
8.HashMap: put(E o, E o1)
9.HashMap: putAll(Map m)
10.HashMap: remove(Object key)
11.HashMap: size()
12.HashMap: values()