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Java Assignment 2

 Java Assignment #2




1.Write a Java program to print the multiplication table of 5 (from 5 * 1 = 5 to 5 * 10 = 50) using both a for loop and a while loop.


2.Write a Java program to simulate a traffic light using a switch case statement. The program should allow the user to select one of three lights: red, yellow, or green. Based on the user's choice, display an appropriate message indicating the traffic action (e.g., "Stop", "Ready", or "Go") in the selected color.


3.Write a Java program to reverse the string "QAShastra Online Training" using the charAt() method of the String class. The program should iterate through the string and construct the reversed version character by character.


4. Write a Java method that takes an integer array as a parameter, calculates the sum of all the integers in the array, and returns the sum.


5. Write a Java method that takes a String array as a parameter. The method should:
Calculate and print the length of each string in the array.
Check if a specific string (e.g., "Selenium") exists in the array, and print an appropriate message indicating whether it is present or not.

For example, given the array {"QAShastra", "Selenium", "Java", "Online", "Training"}, the method should determine if the string "Selenium" exists and print the lengths of all strings in the array.

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