How to print a new line between two forEach loops in lambda expressions in java-CodePudding

I am trying to create a lambda expression in java to run the following thread. I need to make the outcome as below.

But according to the code I have written it comes as 1234512345123451234512345. I have identified this happens because of the lack of a println("") statement after the second forEach loop. Therefore I tried writting a new println("") statement but it does not work. How can fix this issue? Where should I write the println("") statement here?

public class Tb {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        
        Runnable r2 = () -> {
            IntStream.iterate(1,i-> i 1).limit(5).
            forEach(i-> IntStream.iterate(1, j->j 1).limit(5).
                    forEach(j->{System.out.print(j);}) 
                    
            
                    
            
                    );
            
        };
        
        new Thread(r2).start();

    }

}

CodePudding user response：

Just add a new line before the 2nd IntStream.

IntStream.iterate(1, i -> i   1).limit(5).forEach(i -> {
                System.out.println();
                IntStream.iterate(1, j -> j   1).limit(5).forEach(System.out::print);
            });

NB: I have also modified the last foreach for my preference.

CodePudding user response：

To add the line after every forEach loop need to add println after the second forEach such as below.

public static void main(String[] args) {
    // TODO Auto-generated method stub

    Runnable r2 = () -> {
        IntStream.iterate(1, i -> i   1).limit(5)
                .forEach(i -> {
                    IntStream.iterate(1, j -> j   1).limit(5).forEach(j -> {
                        System.out.print(j);

                    });
                    System.out.println();
                });

    };

    new Thread(r2).start();

}

CodePudding user response：

Just put your statement in your outer forEach in curly brackets {} and add a println statement:

public static void main(String[] args) {
    Runnable r2 = () -> {
        IntStream.iterate(1,i-> i 1)
                .limit(5)
                .forEach(i-> {
                    IntStream.iterate(1, j -> j   1)
                            .limit(5)
                            .forEach(j -> {
                                System.out.print(j);
                            });
                    System.out.println();
                });
    };
    new Thread(r2).start();
}