Java利用移位运算将int型分解成四个byte型的方法

package 移位运算;
public class 移位运算 {
public static void main(String[] args) {
//00000111 01011011 11001101 00010101
int n=123456789; //n为需要进行移位处理的32位int型初始值
byte[] a =chai(n);
for (int i = 0; i < a.length; i++) {
byte b=a[i];
System.out.print(b+" ");
}
//将数组重新合并成一个int型
System.out.println(hebing(a));
}
private static int hebing(byte[] arr) {
int n=0;
/*for (int i = 0; i < arr.length; i++) { //循环位或
n=n|arr[i]<<8*(arr.length-1)>>>8*i;
}
*
* n=n|arr[0]<<24;
* n=n|arr[1]<<24>>>8;
* n=n|arr[2]<<24>>>16;
* n=n|arr[3]<<24>>>24;
*/
for (int i = 0; i < arr.length; i++) { //循环位或
n+=(arr[i]&0x000000ff)<<8*(arr.length-1-i);
}
return n;
}
private static byte[] chai(int n) {
// 新建四个长度的byte数组
byte[] arr = new byte[4];
for (int i = 0; i < arr.length; i++) {
arr[i] = (byte) (n>>8*(arr.length-i-1));
}
return arr;
}
}

来源：https://blog.csdn.net/weixin_43810579/article/details/84845915