Grade11_ComputerScience_A_Java_Learning/unit1_1_4.java at main · harinivbaskar/Grade11_ComputerScience_A_Java_Learning · GitHub

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class unit1_1_4 {
    public static void main(String[] args) {
        // Implicit Conversion
        double x = 10; // double variable is assigned with integer value.

        System.out.println("double x: " + x);

        float y = 10; // float variable is assigned with integer value.

        System.out.println("float y: " + y);

        Integer z = 100; // or Integer z = new Integer(100);
        System.out.println("Integer z: " + z); // implicitly calls toString()
        System.out.println("Integer z.toString(): " + z.toString());
        System.out.println("Integer z+10: " + (z+10));

        // args is an array which is a reference type
        System.out.println("args: " + args);

        // Primitive data type name
        double VAR = 3.14;
        System.out.println("double VAR: " + VAR);

        // String + int
        System.out.println("Harry" + 731);

        // int + String
        System.out.println(731 + 10);
        System.out.println(731 + 10 + "Harry");
        System.out.println(731 + "Harry" + 10 + 15 + "Potter");

        // final
        final double PI = 22.0 / 7 ;
        System.out.println("double PI: " + PI);

        // change the value of PI. End up with compilation error.
        // PI = 100;
        //     0000 0000 0000 0000 0000 0000 0000 0000
        //     0000 0000 0000 0000 0000 0000 0000 0001
        //     0000 0000 0000 0000 0000 0000 0000 0010

        //     1111 1111 1111 1111 1111 1111 1111 1110
        //     1111 1111 1111 1111 1111 1111 1111 1111

        //   1 0000 0000 0000 0000 0000 0000 0000 0000


    }
}