Automation Diaries: January 2023

Q4.Find Missing Numbers in Array in Java

package practice1;

public class Q4_FindMissingNumberinArray {
	public static void main(String[] args) {
		int a[]= {1,2,4,5};
		
		int sum=0;
		
		for(int i=0;i<a.length;i++) {
			
			sum=sum+a[i];
		}
		
		System.out.println(sum);
        
		int b[]= {1,2,3,4,5};
		
		int sum1=0;
		
		for(int j=0;j<b.length;j++) {
			
			sum1=sum1+b[j];
		}
		
		System.out.println(sum1);
		System.out.println("Missing Number is :::"+(sum1-sum));
		
	}
}

Q3.Reverse an Integer in Java

package practice1;
public class Q3_ReverseInteger {
	public static void main(String[] args) {
      int num=12345;
      
      int rev=0;
      
      while(num!=0) {
    	  
    	  rev=rev*10+num%10; //5
    	  num=num/10;//1234
     	  
      }
      
      System.out.println(rev);
	
	//example 2
      
      //Here string buffer is mutable 
	
	int s1=9876;
	System.out.println(new StringBuffer(String.valueOf(s1)).reverse());
	
	
	}
}

Q2.Remove Special Chars in a String in Java

package practice1;
public class Q2_RemoveJunkorSpecialCharsString {
	public static void main(String[] args) {
		
		String s="%$@%$&^% Testing 3726537265";
		
		String s1="sanjeev)((*&*(&*&(&* 097656467465";
		//Regular Expression : [^a-zA-Z0-9]
		
		s=s.replaceAll("[^a-zA-Z0-9]", "");
		
		s1=s1.replaceAll("[^a-zA-Z0-9]", "");
		System.out.println(s);
		System.out.println(s1);
	}
}

Q6.Reverse a Sentence in Java

package practice1;

import java.util.Scanner;

public class PrintSentenceReverse {

public static String reversestringsentence(String InputString) {

String word[]=InputString.split("\\s");

String Outputvalue="";

for(int i=word.length-1;i>=0;i--){

Outputvalue=Outputvalue+word[i]+" ";

}

return Outputvalue;

}

public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

String InputString=sc.nextLine();

System.out.println("Input String is ::: "+InputString);

String Outputvalue=PrintSentenceReverse.reversestringsentence(InputString);

System.out.println("Output Sting is ::: "+Outputvalue);

}

(or)

public class SentenseRev{

public static void main(String[] args){

String inputText="Sompalli Sanjeevaiah";

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

int wordlength=words.length;

String output="";

for(int i=wordlength-1; i>=0; i--){

output=output+words[i]+" ";

}

System.out.println(output);

}

Q1.Reverse A String in Java

class ReverseString {

public static void main(String[] args) {

String InputString="Current Company Infosun";

System.out.println("Input String is ::: "+InputString);

int leng=InputString.length();