source code Integer

package wclasses;

public class SampleInteger {
    public static void main(String att[])
    {
        //constructors
        Integer i1= new Integer(10);
        Integer i2= new Integer("10");

        // wrapper to primitive
        int pi1=i1.intValue();
        System.out.println(pi1);

        //binary,octa,hexa notations.
        String bin=Integer.toBinaryString(10);
        System.out.println(bin);
        String oct=Integer.toOctalString(12);
        System.out.println(oct);
        String hex=Integer.toHexString(12);
        System.out.println(hex);

        //primitive to string
        String s1=i1.toString();
        String s2=Integer.toString(10);
        System.out.println(s1);
        System.out.println(s2);
        
        //String to primitive
        int pi2=Integer.parseInt(s2);
        System.out.println(pi2);
        
        //String to wrapper object
        Integer i3= new Integer("10");
        Integer i4=Integer.valueOf("100");
        System.out.println(i3);
        System.out.println(i4);

        //wrapper to string
        String s3=i4.toString();
        
        
    }
}

output:
10
1010
14
c
10
10
10
10
100