ques2.java

import java.util.function.DoublePredicate; 
  
public class DoublePredicateDemo { 
    public static void main(String[] args) 
    { 
        // DoublePredicate to check square 
        // of x is less than 100 
        DoublePredicate db 
            = (x) -> { return x * x < 100.0; }; 
        System.out.println("100 is less than 100 "
                           + db.test(10)); 
  
        DoublePredicate db3; 
        // Test condition reversed 
        db.negate(); 
        System.out.println("100 is greater than 100 "
                           + db.test(10)); 
  
        DoublePredicate db2 = (x) -> 
        { 
            double y = x * x; 
            return y >= 36 && y < 1000; 
        }; 
  
        // Test condition ANDed 
        // with another predicate 
        db3 = db.and(db2); 
        System.out.println("81 is less than 100 "
                           + db3.test(9)); 
  
        db3 = db.or(db2); 
        // Test condition ORed with another predicate 
        System.out.println("49 is greater than 36"
                           + " and less than 100 "
                           + db3.test(7)); 
    } 
}