import java.util.stream.Stream;

public class Task120625 {
    public static void main(String[] args) {
        long count = Stream.of(1, 2, 3, 4)
                .map(i -> {
                    System.out.print("m" + i + " ");
                    return i * 2;
                })
                .filter(i -> {
                    System.out.print("f" + i + " ");
                    return i > 3;
                })
                .count();

        System.out.println("\ncount=" + count);
    }
}

public class Task130625 {
    public static void main(String[] args) {
        String s1 = "Java";
        String s2 = new String("Java").intern();
        String s3 = new StringBuilder("Ja").append("va").toString();
        String s4 = s3.intern();
        
        System.out.println((s1 == s2) + " " + (s1 == s3) + " " + (s1 == s4));
    }
}

import java.util.stream.IntStream;

public class Task160625 {
    public static void main(String[] args) {
        IntStream.rangeClosed(1, 5)
                .filter(i -> i % 2 == 0)
                .peek(System.out::print)
                .forEachOrdered(i -> {});
    }
}

interface A170625 {
    default void show() {
        System.out.println("A");
    }
}

interface B170625 extends A170625 {
    default void show() {
        System.out.println("B");
    }
}

interface C170625 extends A170625 {}

class D170625 implements B170625, C170625 {
    public static void main(String[] args) {
        new D170625().show();
    }
}

import java.util.Optional;

public class Task180625 {
    public static void main(String[] args) {
        Optional<String> opt = Optional.ofNullable(null)
                                    .flatMap(s -> Optional.of("value"))
                                    .or(() -> Optional.of("default"));
        
        System.out.println(opt.get());
    }
}

import java.util.function.Function;

public class Task190625 {
    public static void main(String[] args) {
        var x = (Function<Function<Integer, Integer>, Integer>) 
                f -> f.apply(10);
        
        var y = x.apply(n -> n * 2);
        System.out.println(y);
    }
}

import java.util.function.Supplier;

public class Task200625 {
    public static void main(String[] args) {
        Supplier<Integer> supplier = () -> {
            System.out.print("A");
            return 1;
        };

        System.out.print("B");
        supplier.get();
        System.out.print("C");
    }
}

import java.util.function.Consumer;

public class Task230625 {
    public static void main(String[] args) {
        Consumer<String> consumer1 = s -> System.out.print(s.toUpperCase());
        Consumer<String> consumer2 = s -> System.out.print("|" + s + "|");
        
        consumer1.andThen(consumer2).accept("test");
    }
}

public class Task240625 {
    public static void main(String[] args) {
        String s = null;
        s = s + "Java";
        System.out.println(s);
    }
}

import java.util.function.Consumer;

public class Task250625 {
    public static void main(String[] args) {
        Consumer<String> c1 = s -> System.out.print("A" + s);
        Consumer<String> c2 = s -> System.out.print("B" + s);
        
        c1.andThen(c2).accept("1");
        c2.andThen(c1).accept("2");
    }
}

public class Task260625 {
    public static void main(String[] args) {
        Integer a = 100;
        Integer b = 100;
        Integer c = 200;
        Integer d = 200;
        
        System.out.println((a == b) + " " + (c == d));
    }
}