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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10.     public static void main(String[] args) throws IOException {
  11.         BufferedReader input = new BufferedReader(new InputStreamReader(
  12.                 System.in));
  13.         HashMap<Character, String> map = new HashMap<Character, String>();
  14. 		map.put('0', "0000");
  15.     	map.put('1', "0001");
  16.     	map.put('2', "0010");    	     
  17. 		map.put('3', "0011");
  18. 		map.put('4', "0100");
  19. 		map.put('5', "0101");
  20. 		map.put('6', "0110");
  21. 		map.put('7', "0111");
  22. 		map.put('8', "1000");
  23. 		map.put('9', "1001");
  24. 		map.put('A', "1010");
  25. 		map.put('B', "1011");
  26. 		map.put('C', "1100");
  27. 		map.put('D', "1101");
  28.     	map.put('F', "1111");
  29.         System.out.print("Input your Hex Number here : ");
  30.         String userInput = input.readLine();
  31.     	StringBuilder result = new StringBuilder();
  32.  
  33.     	for (int i = 0; i < userInput.length(); i++) {
  34.         	/* used for separating the value */
  35.         	char hexVal = userInput.charAt(i);
  36.         	String binary = map.get(hexVal);
  37.         	result.append(binary);
  38.         }
  39.  
  40.         //Main output
  41.         System.out.println("THE BINARY OF " + userInput + ":" + result.toString());
  42.  
  43.  
  44.     }
  45. }
Success #stdin #stdout 0.07s 380160KB
comments (?)
stdin 
5F
stdout 
Input your Hex Number here : THE BINARY OF 5F:01011111
https://ideone.com/SaQ8m7
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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