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Java Tutorial : Java wrapper class object creation

WrapperClassTest.java

public class WrapperClassTest
{

    public static void main(String[] args)
    {

        Integer integerObj1 = new Integer(80);
        System.out.println("integerObj1 = " + integerObj1);

        Integer integerObj2 = new Integer("100");
        System.out.println("integerObj2 = " + integerObj2);

        Double doubleObj1 = new Double(10.99);
        System.out.println("doubleObj1 = " + doubleObj1);

        Double doubleObj2 = new Double("98.55");
        System.out.println("doubleObj2 = " + doubleObj2);

    }
}