Basic Java Program for Selenium Interview -2

1. Write a java code for reverse a number.

  public class ReverseNum {

public static void main(String args[]){
 
      int num=323,sum=0,r;;
     
   
  while(num>0){
 
   r=num%10;
   sum=r+sum*10;
   num=num/10;
 
  }
  System.out.println(sum);  
 
   }
   
 }

2. Write a code for finding duplicate word in a sentence.

   public class DupliWord {

public static void main(String[] args) {

        System.out.print("Enter string to analyse:");
        Scanner sn = new Scanner(System.in);
        String input = sn.nextLine();

        // first let us split string into words
        String[] words = input.split(" ");

        // adds all words into a map
        // we also check whether the word is already in map!
        Map<String,String> wordMap = new HashMap<String,String>();
        for(int i=0;i<words.length;i++) {

            String word = words[i].toUpperCase(); // for case insensitive comparison

            if(wordMap.get(word)!=null) {

                // we found a duplicated word!

                System.out.println("Duplicated/Repeated word:"+word);

            }else {

                wordMap.put(word, word);
             

            }
           
        }
     
    } 


}

3. Write a program for sorting a String.

  import java.util.Arrays;

   public class StringSort {

public static void main(String[] args) {

String s1="deabc";

char[] c=s1.toCharArray();// covert string into sequence of character

Arrays.sort(c);// sorting char

String sorted = new String(c);

System.out.println(sorted);

}

}

4. Write a java code for count word in string.

  Method 1:

  

  public class Words_Count {

public static void main(String[] args) {

System.out.println("Enter a string");

Scanner sc=new Scanner(System.in);

String s=sc.nextLine();

String[] words=s.trim().split(" ");

System.out.println(words.length);

}

}

Method 2 :

public class Words_Count_2 {

public static void main(String[] args) {

String s="This is a boy";

    int count=1;

for(int i=0; i<=s.length()-1; i++){

if((s.charAt(i)== ' ' ) && (s.charAt(i+1) != ' ') ){

count++;

}

}

System.out.println("Number of words = " + count);

}

}