Can the main() method in Java return any data?

Predict the output of the following Java code.

public class j{

public static void main(String args[]){

System.out.println(true ? 100:105.4);

}

}

Which Java package is used for handling security-related issues in a program?

class test {

public static void main (String[] args) {

  int n=16;

               n=arr[arr[arr[++n/2]]]/2;

               System.out.println((double)arr[--n]/2);

}

}

class test{

public static void main (String[] args) {

     double A[2];

     int B=new int[2];

     System.out.println(A[0]+" "+B[0]);

}

}

//Predict the output

import java.util.Scanner;

public class Main

{

    public static void main(String args[])

    {

        String str = "classMate";

        char s2 = str.charAt(5);

        System.out.println(s2);

    }

}

1. class C 

2.     {

3.         public static void main(String args[]) 

4.         {

5.             char c1 = 'E';

6.             char c2 = 84;

7.             c2++;

8.             c1+=1;

9.             System.out.println(c1 + " "  + c2);

10.         } 

11.     }

Which of these statements about multithreading and thread states is incorrect?

Predict the output of the following Java code:

import java.util.*;

import java.util.stream.IntStream;

class Abekus {

public static void main(String[] args) {

IntStream i = IntStream.concat(IntStream.of(2, 6, 10, 46),

IntStream.of(-2, -5, 3, 8));

boolean j = i.allMatch(n -> n > 0);

System.out.println(j);

}

}