Good example code using Byte class methods.

package wclasses;

public class SampleByte {
    public static void main(String as[])
    {
        //constructors
        byte b=10;
        Byte b1= new Byte(b);
        Byte b2= new Byte("10");

        // Byte  to primitive byte
        byte bi=b1.byteValue();
        int bi1=b1.intValue();
        System.out.println(bi);
        System.out.println(bi1);

        //byte to string
        String s1=b1.toString();
        String s2=Byte.toString(b);
        System.out.println(s1);
        System.out.println(s2);
        
        //String to primitive byte
        byte pi2=Byte.parseByte(s2);
        System.out.println(pi2);
        
        //String to wrapper Byte
        Byte b3= new Byte("10");
        Byte b4=Byte.valueOf("100");
        System.out.println(b3);
        System.out.println(b4);

        //Byte wrapper to string
        String s3=b4.toString();
        
    }
}

output:
10
10
10
10
10
10
100