JAVa中进制之间的转化方法

public class Code {

    public static void main(String[] args)  throws Exception{
        // TODO Auto-generated method stub
        String s="自己练习";
        byte[] byte1=s.getBytes();//将字符串转化为字符数组,用项目默认的编码
        for (byte b : byte1) {
            //把字节以十六进制的方式显示
            System.out.print(Integer.toHexString(b&0xff)+" ");
        }
    System.out.println( );
    //jbk中文占用两个字节，英文占用一个字节
    byte[] byte2=s.getBytes("gbk");
    for (byte b : byte2) {
        System.out.print(Integer.toHexString(b&0xff)+" ");
    }
//其中个utf-8中文占用三个字节，英文占用一个字节
    System.out.println();
    byte[] byte3=s.getBytes("utf-8");
    for (byte b : byte3) {
        System.out.print(Integer.toHexString(b&0xff)+" ");
    }
    //java是双字节编码，utf-16be编码
    //其中中文占用两个字节，英文占用两个字节
    System.out.println();
    byte[] byte4=s.getBytes("utf-16be");
    for (byte b : byte4) {
        System.out.print(Integer.toHexString(b&0xff)+" ");
    }
    System.out.println();
    String st1=new String(byte4,"utf-16be");
    System.out.print(st1);
    
    System.out.println();
    byte[] byte5=s.getBytes("US-ASCII");
    for (byte b : byte5) {
        System.out.print(Integer.toHexString(b&0xff)+" ");
    }
    }

}