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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. interface NumFmt {
  8.  
  9. 	String string(byte b);
  10. 	String string(short n);
  11. 	String string(int n);
  12. 	String string(long n);
  13. }
  14.  
  15. final class Hex implements NumFmt {
  16.  
  17. 	public static final Hex HEX = new Hex();
  18.  
  19. 	@Override
  20. 	public String string(byte b) {
  21. 		return String.format("0x%02X", b);
  22. 	}
  23.  
  24. 	@Override
  25. 	public String string(short n) {
  26. 		return String.format("0x%04X", n);
  27. 	}
  28.  
  29. 	@Override
  30. 	public String string(int n) {
  31. 		return String.format("0x%08X", n);
  32. 	}
  33.  
  34. 	@Override
  35. 	public String string(long n) {
  36. 		return String.format("0x%016X", n);
  37. 	}
  38. }
  39.  
  40. final class Bin implements NumFmt {
  41.  
  42. 	public static final Bin BIN = new Bin();
  43.  
  44. 	@Override
  45. 	public String string(byte b) {
  46. 		return String.format("0b%8s", Integer.toBinaryString(b)).replace(' ', '0');
  47. 	}
  48.  
  49. 	@Override
  50. 	public String string(short n) {
  51. 		return String.format("0b%16s", Integer.toBinaryString(n)).replace(' ', '0');
  52. 	}
  53.  
  54. 	@Override
  55. 	public String string(int n) {
  56. 		return String.format("0b%32s", Integer.toBinaryString(n)).replace(' ', '0');
  57. 	}
  58.  
  59. 	@Override
  60. 	public String string(long n) {
  61. 		return String.format("0b%64s", Long.toBinaryString(n)).replace(' ', '0');
  62. 	}
  63. }
  64.  
  65. /* Name of the class has to be "Main" only if the class is public. */
  66. class Ideone {
  67.  
  68. 	public static void main (String[] args) throws java.lang.Exception {
  69. 		for (NumFmt fmt : new NumFmt[]{
  70. 			Hex.HEX, Bin.BIN
  71. 		}) {
  72. 			for (String s : new String[]{
  73. 				fmt.string(11),
  74. 				fmt.string((byte) 11),
  75. 				fmt.string(11L),
  76. 			}) {
  77. 				System.out.println(s);
  78. 			}
  79. 		}
  80. 	}
  81. }
Success #stdin #stdout 0.12s 34192KB
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Standard input is empty
stdout
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0x0000000B
0x0B
0x000000000000000B
0b00000000000000000000000000001011
0b00001011
0b0000000000000000000000000000000000000000000000000000000000001011
https://ideone.com/yaS3Zo
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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