\W matches nonword character using regular expression in java 

Runnable r = new Runnable() { 

@Override

public void run() {

}

};

Is the code valid?

Which of these class holds a collection of static methods and variables?

class test{

public static void main (String[] args) {

  int x=10;

  if(++x<10 || x/0>10)

  System.out.println("Hello");

  else

  System.out.println("Hi");

}

}

public class outputs 

    {

        public static void main(String args[]) 

        {

            int a=10;

int b=20;

int c=15;

int sum=0;

sum= a%b%c;

System.out.println(sum);

        } 

    }

What is the output of the following Java code?

class Abekus {
   public static void main(String args[]) {  
       System.out.println(fun());
   }  
   static int fun(int x = 0) {
       return x;
   }

public class Demo123{

     public static void main(String args[]){

  int a=10,b=12;

  if(a && b){

    System.out.println("Abekus");

  }

   else

 System.out.println("not Abekus");

}

}

public class Demo123{

     public static void main(String args[]){

  int a=10;

  Integer b=12;

  if(a.equals(b)){

    System.out.println("true");

  }

   else

 System.out.println("false");

}

}

Which one   of the following is not true?

Predict the output of the following Java code:

class Abekus {

public static void main(String[] args) {

int i1[] = { 10, 20, 30, 40, 50 };

int i2[] = { 10, 20, 30, 40, 50 };

for (int i = 0; i < 4; i++)

System.out.print(i1[i] + " ");

System.out.println();

for (int i = 0; i < 4; i++)

System.out.print(i2[i+1] + " ");

}

}