Print the content of hashMap object

Mon Oct 22, 2012 8:23 pm

Display the content of hashMap, check if contains a key, print its size, remove its content and finally check it if empty

Code:: import java.util.HashMap; import java.util.Map.Entry; import java.util.Set; public class ArraysWork { public static void main(String[] arr) { /* Create object of HashMap */ HashMap<String, String> hashMap = new HashMap<String, String>(); /* Add entries to hashMap (Keys,Values) */ hashMap.put("A", "Apple"); hashMap.put("B", "Book"); hashMap.put("C", "Car"); hashMap.put("D", "Dog"); hashMap.put("E", "Elephant"); hashMap.put("F", "Flower"); // Print the content of the hashMap Set<Entry<String,String>> hashSet=hashMap.entrySet(); for(Entry entry:hashSet ) { System.out.println("Key="+entry.getKey()+", Value="+entry.getValue()); } System.out.println("-----------------------------"); // Print the size of hashMap System.out.println("HashMap size="+hashMap.size()); // Checking and searching if(hashMap.containsKey("X")) { System.out.println("HashMap has a key X"); }else{ System.out.println("HashMap hasn't a key X"); } // Remove the content of the hashMap hashMap.clear(); // Check if the hashMap empty if(hashMap.isEmpty()) { System.out.println("The hashMap is empty"); } } }

The output is :

Code:: Key=D, Value=Dog Key=E, Value=Elephant Key=F, Value=Flower Key=A, Value=Apple Key=B, Value=Book Key=C, Value=Car ----------------------------- HashMap size=6 HashMap hasn't a key X The hashMap is empty