java int转byte数组

int 转 byte[]   低字节在前(低字节序)

1 public static byte[] toLH(int n) {  
2   byte[] b = new byte[4];  
3   b[0] = (byte) (n & 0xff);  
4   b[1] = (byte) (n >> 8 & 0xff);  
5   b[2] = (byte) (n >> 16 & 0xff);  
6   b[3] = (byte) (n >> 24 & 0xff);  
7   return b;  
8 }

int 转 byte[]   高字节在前(高字节序)

1 public static byte[] toHH(int n) {  
2   byte[] b = new byte[4];  
3   b[3] = (byte) (n & 0xff);  
4   b[2] = (byte) (n >> 8 & 0xff);  
5   b[1] = (byte) (n >> 16 & 0xff);  
6   b[0] = (byte) (n >> 24 & 0xff);  
7   return b;  
8 }

byte[] 转 int 低字节在前(低字节序)

1 public int toInt(byte[] b){
2     int res = 0;
3     for(int i=0;i<b.length;i++){
4         res += (b[i] & 0xff) << (i*8);
5     }
6     return res;
7 }

byte[] 转 int 高字节在前(高字节序)

1 public static int toInt(byte[] b){
2     int res = 0;
3     for(int i=0;i<b.length;i++){
4         res += (b[i] & 0xff) << ((3-i)*8);
5     }
6     return res;
7 }

 

posted @ 2020-08-04 17:35  Boblim  阅读(7760)  评论(0编辑  收藏  举报