java.lang.Boolean class methods

// Java program illustrating Boolean class methods
// booleanValue(), compareTo(), hashCode(), toString()
import java.lang.*;
public class NewClass
{

    public static void main(String[] args)
    {
        // Creating a boolean object and assigning value to it.
        Boolean bool1 = new Boolean(true);
        Boolean bool2 = new Boolean(false);
        System.out.println("Boolean object - bool1 : "+bool1);
        System.out.println("Boolean object - bool2 : "+bool2);


        // Creating a boolean primitive bool2
        boolean bool3, bool4 ;
        // Use of booleanValue()
        // Assigning object value to primitive variable.
        bool3 = bool1.booleanValue();
        System.out.println("Primitive value of object i.e. bool3 : "+bool3);

        bool4 = bool2.booleanValue();
        System.out.println("Primitive value of object i.e. bool4 : "+bool4);
        System.out.println("");


        // Comparing two boolean instances bool1 and bool2
        // Use of compareTo() method
        int comp = bool1.compareTo(bool2);
        if (comp > 0)
            System.out.println("bool1 is greater than bool2 as comp = "+comp);
        if (comp == 0)
            System.out.println("bool1 is equal to bool2 as comp = "+comp);
        if (comp < 0)
            System.out.println("bool1 is less than bool2 as comp = "+comp);
        System.out.println("");

        // HashCode value of the boolean object.
        // use of hashCode() method
        int h1 = bool1.hashCode();
        int h2 = bool2.hashCode();
        System.out.println("Hash Code value of bool1 : " + h1);
        System.out.println("Hash Code value of bool2 : " + h2);
        System.out.println("");

        // String representation of the boolean object
        // Use of toString() method.
        String s1, s2;
        s1 = bool1.toString();
        s2 = bool2.toString();
        System.out.println("String value of bool1 : " + s1);
        System.out.println("String value of bool2 : " + s2);
    }
}

// Java program illustrating getBoolean() method
import java.lang.*; // Using Boolean and System classes
public class NewClass
{
    public static void main(String[] args)
    {
        /* Use of getBoolean() to check whether
        any value is assigned to Property - p1, p2 or not */
        boolean b1 = Boolean.getBoolean("p1");
        boolean b2 = Boolean.getBoolean("p2");

        System.out.println("Bool Value of p1 : "+b1);
        System.out.println("Bool Value of p2 : "+b2);
        System.out.println("");
        System.out.println("Since, no value assigned to p1, p2, Bool value is false");
        System.out.println("Assign value to p1,p2 using java.lang.System.setProperty()");

        System.out.println("");

        System.setProperty("p1","true");
        System.setProperty("p2","Cool");

        boolean b3 = Boolean.getBoolean("p1");
        boolean b4 = Boolean.getBoolean("p2");

        System.out.println("Bool Value of p1 : " + b3);
        System.out.println("Bool Value of p2 : " + b4);
    }
}

// Java program illustrating parseBoolean() and valueOf() method
import java.lang.*;
public class NewClass
{
    public static void main(String[] args)
    {
        boolean b1 = false;
        boolean b2 = true;
        
        // Use of valueOf() method
        boolean val1 = Boolean.valueOf(b1);
        boolean val2 = Boolean.valueOf(b2);

        System.out.println("Value of b1 : "+ val1);
        System.out.println("Value of b2 : " +val2);
        System.out.println("");

        // Use of parseBoolean() method
        String st1, st2, st3;
        st1 = "True";
        st2 = "yes";
        st3 = "true";  // Case insensitive

        boolean p1 = Boolean.parseBoolean(st1);
        boolean p2 = Boolean.parseBoolean(st2);
        boolean p3 = Boolean.parseBoolean(st3);

        System.out.println("Value of String st1 as Boolean : "+p1);
        System.out.println("Value of String st2 as Boolean : "+p2);
        System.out.println("Value of String st3 as Boolean : "+p3);
    }
}