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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. import java.io.BufferedInputStream;
  7. import java.io.FileInputStream;
  8.  
  9. class Struct{
  10. 	private byte []a;
  11. 	private byte []b;
  12. 	byte []buf;	
  13. 	Struct(){
  14. 		a=new byte[4];
  15. 		b=new byte[4];
  16. 		buf=new byte[a.length+b.length];
  17. 	}
  18.  
  19. 	String GetA(){
  20. 		System.arraycopy(buf, 0, a, 0, a.length);
  21. 		return new String(a);
  22. 	}
  23.  
  24. 	long GetB(){
  25. 		System.arraycopy(buf, a.length, b, 0, b.length);
  26. 		int len=b.length;
  27. 		int[] c=new int[len];
  28. 		int[] d=new int[len];
  29.  
  30. 		for(int i=0;i<len;i++){
  31. 			c[i]=((int)b[i] & 0xFF);
  32. 			d[i]=c[i];
  33. 		}
  34. 		long x=0;
  35. 		for(int i=0;i<len;i++){
  36. 			c[i]=d[len-1-i];// byte order reverse
  37. 			x+=((long)c[i]<<(8*(len-1-i)));
  38. 		}
  39.  
  40. 		return x;
  41. 	}
  42. }
  43.  
  44. class Ideone
  45. {
  46. 	public static void main (String[] args) throws java.lang.Exception
  47. 	{
  48. 		BufferedInputStream bis=null;
  49. 		Struct st=new Struct();
  50. 		try{
  51. 			bis=new BufferedInputStream(new FileInputStream("test"));
  52. 			for(int i=0;i<3;i++){
  53. 				bis.read(st.buf);
  54. 				System.out.println(st.GetA()+"\n");
  55. 				System.out.println(st.GetB()+"\n");
  56.  
  57. 			}
  58. 		}
  59. 		catch(Exception e){
  60.  
  61. 		}
  62. 	}
  63. }
Success #stdin #stdout 0.12s 320576KB
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https://ideone.com/Xy1fef
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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