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HashMap nur die Keys der Map ausgeben

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Language: Java
Posted by: I Do Not Understand Anything That I Am Coding!
Added: May 5, 2021 4:59 PM
Views: 4007
Tags: collections
  1. public static void main(String[] args) {
  2.  
  3.         var hash_map = new HashMap<Integer, String>();
  4.  
  5.         //Werte zuweisen mit PUT anstatt mit ADD!!
  6.         hash_map.put(1, "Red");
  7.         hash_map.put(2, "Green");
  8.         hash_map.put(3, "Black");
  9.         hash_map.put(4, "White");
  10.         hash_map.put(5, "Blue");
  11.  
  12.         var hash_map2 = new HashMap<Integer, String>();
  13.         hash_map2.put(4, "White");
  14.         hash_map2.put(5, "Blue");
  15.         hash_map2.put(6, "Orange");
  16.  
  17.         Set keyset = hash_map.keySet();
  18.         System.out.println("Key set values are: " + keyset);
  19.     }
  20. }
  21.  

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