Class work

//1st code
import java.util.Scanner;
public class MyClass {
    public static void main(String args[]) {
      int a=5;
      int b=5;
      try{
          System.out.println("Div =  "+a/b);
      }
      catch(Exception e){
          e.printStackTrace();
      }
      finally{
          System.out.println("Done");
      }
    }
}

//2nd code
import java.util.Scanner;
public class MyClass {
    public static void main(String args[]) {
      Scanner usr = new Scanner(System.in);
      String s = usr.nextLine();
      try{
          System.out.println("1st char "+s.charAt(0));
      }
      catch(Exception e){
          System.out.println(e);
      }
      finally{
          System.out.println("Done");
      }
    }
}

//3rd code
import java.util.Scanner;
public class MyClass {
    public static void main(String args[]) {
      Scanner usr = new Scanner(System.in);
      String s = usr.nextLine();
      try{
          System.out.println("Char =  "+s.charAt(100));
      }
      catch(Exception e){
          System.out.println(e);
      }
      finally{
          System.out.println("Done");
      }
    }
}

//4th code
import java.util.Scanner;
public class MyClass extends Exception{
    public MyClass(String str){
        super(str);
    }
    public static void main(String args[]) {
      Scanner usr = new Scanner(System.in);
      int value = usr.nextInt();
      int sum=0;
      try{
          if(value>1000)
            throw new MyClass("Sed laip");
          else
          {
              for(int i=1;i<=value;i++)
                sum+=i;
              System.out.println("Sum = "+sum);
          }
      }
      catch(Exception e){
          System.out.println(e);
      }
      finally{
          System.out.println("Done");
      }
    }
}