Java中如何将byte转int呢?

byte转int的实现思路

带符号转换
   byte本身是带正负符号的, 默认向上转换也是带符号

   方法1 默认转换
		byte b = -3;
		int i = b;
		System.out.println(i); // 结果是 -3
 
   方法2 强制转换
		byte b = -3;
		int i = (int)b;
		System.out.println(i); // 结果是 -3
 
无符号转换
   方法1：
      i = Byte.toUnsignedInt(b);
      i = Byte.toUnsignedInt(b);

public class TestClass {
	public static void main(String[] args) {
		byte b = -8;
		int i;
		i = b;		System.out.println(i);
		i = (int)b;		System.out.println(i);
		i = Byte.toUnsignedInt(b);		System.out.println(i);
		i = b&0xff;		System.out.println(i);
		i = b&255;		System.out.println(i);
		if(b<0)i=b+256; else i=b; System.out.println(i);
		i = b<0 ? b+256 : b; System.out.println(i);
	}

}