Java by API/java.lang/Boolean

Boolean: boolean booleanValue() (Returns the value of this Boolean object as a boolean primitive)

   

public class Main {
  public static void main(String[] args) {
    Boolean b1 = new Boolean(false);
    Boolean b2 = new Boolean("true");
    System.out.println(b1.booleanValue());
    System.out.println(b2.booleanValue());
  }
}

Boolean: parseBoolean(String s)

 
public class Main {
    public static void main(String[] args) {
        String strBoolean = "true";
        
        //String to boolean conversion
        boolean theValue = Boolean.parseBoolean(strBoolean);
        
        System.out.println(theValue);
    }
}
//true

Boolean: String toString()

   

public class Main {
  public static void main(String[] args) {
    Boolean b = Boolean.valueOf("true");
    System.out.println(b.toString());
  }
}

Boolean: valueOf(String stringValue)

   
/*
 * Output:
 
true
c
12
2
13245
12341234
11234.123
4.321324123412341E10

 */
public class MainClass {
  public static void main(String args[]) {
    Boolean bool = Boolean.valueOf("true");
    Character c = new Character("c");
    Byte b = Byte.valueOf("12");
    Short s = Short.valueOf("2");
    Integer i = Integer.valueOf("13245");
    Long l = Long.valueOf("12341234");
    Float f = Float.valueOf("11234.1234");
    Double d = Double.valueOf("43213241234.123412341234");
    System.out.println(bool);
    System.out.println(c);
    System.out.println(b);
    System.out.println(s);
    System.out.println(i);
    System.out.println(l);
    System.out.println(f);
    System.out.println(d);
  }
}

new Boolean(boolean value)

   

public class Main {
  public static void main(String[] args) {
    Boolean b1 = new Boolean(false);
    Boolean b2 = new Boolean("true");
    System.out.println(b1.booleanValue());
    System.out.println(b2.booleanValue());
  }
}

new Boolean(String s)

   

public class Main {
  public static void main(String[] args) {
    Boolean b1 = new Boolean(false);
    Boolean b2 = new Boolean("true");
    System.out.println(b1.booleanValue());
    System.out.println(b2.booleanValue());
  }
}