Data Types in Java

package com.samkough.java.main;

public class Integers
{
    public static void main(String args[])
    {
    	// This line creates an integer primitive data type.
    	int a = 55;
    	// An Integer wrapper class is created from the primitive int type.
        Integer b = new Integer(a);

        // The intValue() method converts the Integer to int. Likewise, the floatValue() returns a float data type.
        int c = b.intValue();
        float d = b.floatValue();

        // These three methods return a binary, hexadecimal and octal representations of the integer.
        String bin = Integer.toBinaryString(a);
        String hex = Integer.toHexString(a);
        String oct = Integer.toOctalString(a);

    	System.out.println(a);
    	System.out.println(b);
    	System.out.println(c);
    	System.out.println(d);

    	System.out.println(bin);
    	System.out.println(hex);
    	System.out.println(oct);
    }
}