What is the output of this program? import java.util.*; class Maps {

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What is the output of this program?
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                                        What is the output of this program?  import java.util.*; class Maps { public static void main(String args[]) { HashMap obj = new HashMap(); obj.put("A", new Integer(1)); obj.put("B", new Integer(2)); obj.put("C", new Integer(3)); System.out.println(obj.keySet()); } }  
                                    
                                
                            
                        

                        
                                                            
                                    A.
                                    [A, B, C].
                                    
                                
                                                            
                                    B.
                                    {A, B, C}
                                    
                                
                                                            
                                    C.
                                    {1, 2, 3}
                                    
                                
                                                            
                                    D.
                                    [1, 2, 3].
                                    
                                
                                                    

                        
                            
                                
                                    Answer» B. {A, B, C}
                                
                            
                        

                        
                        
                            
                                
                                    
                                
                            
                        
                    
                    
                         
                    
                
            
            
             


            
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What is the output of this program?
`import java.util.*; class Maps { public static void main(String args[]) { HashMap obj = new HashMap(); obj.put("A", new Integer(1)); obj.put("B", new Integer(2)); obj.put("C", new Integer(3)); System.out.println(obj.keySet()); } }`

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1.	What is the output of this program? `import java.util.*; class Maps { public static void main(String args[]) { HashMap obj = new HashMap(); obj.put("A", new Integer(1)); obj.put("B", new Integer(2)); obj.put("C", new Integer(3)); System.out.println(obj.keySet()); } }`
A.	[A, B, C].
B.	{A, B, C}
C.	{1, 2, 3}
D.	[1, 2, 3].
Answer» B. {A, B, C}