1.What will be the Output of this program.
2.Basics of java programming : Hashmap
3.Java programming examples: Hashmap
4.Java programming for beginners : HashMap
- public class HashMapJavaTricky{
- public static void main(String[] args) {
- HashMap<Integer,String> hm= new HashMap<Integer, String>();
- hm.put(1, "one");
- hm.put(2, "two");
- hm.put(3, "three");
- System.out.println(hm.size());
- for (Integer name: hm.keySet()){
- System.out.println(name + " " + hm.get(name));
- }
- }
- }
2.Basics of java programming : Hashmap
- public class HashMapJavaTricky{
- public static void main(String[] args) {
- HashMap<Integer,String> hm= new HashMap<Integer, String>();
- hm.put(1, "one");
- hm.put(2, "two");
- hm.put(3, "three");
- hm.put(1, "ONE");
- System.out.println(hm.size());
- for (Integer name: hm.keySet()){
- System.out.println(name + " " + hm.get(name));
- }
- }
- }
3.Java programming examples: Hashmap
- public class HashMapJavaTricky{
- public static void main(String[] args) {
- HashMap<Integer,String> hm= new HashMap<Integer, String>();
- hm.put(1, "one");
- hm.put(2, "two");
- hm.put(3, "three");
- hm.put(1, "ONE");
- hm.put(null,null);
- System.out.println(hm.size());
- for (Integer name: hm.keySet()){
- System.out.println(name + " " + hm.get(name));
- }
- }
- }
4.Java programming for beginners : HashMap
- public class HashMapJavaTricky{
- public static void main(String[] args) {
- HashMap<Integer,String> hm= new HashMap<Integer, String>();
- hm.put(1, "one");
- hm.put(2, "two");
- hm.put(3, "three");
- hm.put(1, "ONE");
- hm.put(null,null);
- Integer i=null;
- String str="java programming basics Interview questions";
- hm.put(i, str);
- System.out.println(hm.size());
- for (Integer name: hm.keySet()){
- System.out.println(name + " " + hm.get(name));
- }
- }
- }
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