w3resource

Java Exercises: Create a new string taking first three characters from a given string

Java Basic: Exercise-72 with Solution

Write a Java program to create a new string taking first three characters from a given string. If the length of the given string is less than 3 use "#" as substitute characters.

Test Data: str1 = "Python"
str2 = " "

Sample Solution:

Java Code:

import java.lang.*;
 public class Exercise72 {
 public static void main(String[] args)
 {
    String str1 = "";    
	int len = str1.length();
	if(len >= 3)
		System.out.println( str1.substring(0, 3));
	else if(len == 1)
		System.out.println( (str1.charAt(0)+"##"));
	else
		System.out.println("###");
	}
}


Sample Output:

###

Pictorial Presentation:

Java exercises: Create a new string taking first three characters from a given string
Java exercises: Create a new string taking first three characters from a given string

Flowchart:

Flowchart: Java exercises: Create a new string taking first three characters from a given string

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a Java program to create the concatenation of the two strings except removing the first character of each string.
Next: Write a Java program to create a new string taking first and last characters from two given strings.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Share this Tutorial / Exercise on : Facebook and Twitter

Java: Tips of the Day

countOccurrences

Counts the occurrences of a value in an array.

Use Arrays.stream().filter().count() to count total number of values that equals the specified value.

public static long countOccurrences(int[] numbers, int value) {
    return Arrays.stream(numbers)
            .filter(number -> number == value)
            .count();
}

Ref: https://bit.ly/3kCAgLb