// Demonstrate boolean values. 
class BoolTest { 
public static void main(String args[]) { 
boolean b; 

b = false; 
System.out.println("b is " + b); 
b = true; 
System.out.println("b is " + b); 
// a boolean value can control the if statement 
if(b) System.out.println("This is executed."); 
b = false; 
if(b) System.out.println("This is not executed."); 
// outcome of a relational operator is a boolean value 
System.out.println("10 > 9 is " + (10 > 9)); 
} 
} 

b is false 
b is true 
This is executed. 
10 > 9 is true 

if(b == true) ... 

class br {
  static boolean f1() {
    return false;
  }
  static boolean f2() {
    return true;
  }
  static boolean f3() {
    return true;
  }
}
 
boolean f_1 = br.f1()&&br.f2()&&br.f3();

boolean f_2 = br.f2()||br.f1()||br.f3();

boolean f_3 = br.f2()||br.f3()&&br.f1();

f_3=( br.f2()||br.f3())&&br.f1();

boolean f = true^true;