Page 78 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

EXERCISE 92 : Use the JAVA string class methods

Objectives

At the end of this exercise you shall be able to
• know more about the use of string class methods in Java
• develop Java programs using string class methods.

Requirements

Tools/Materials
• PC/Laptop with Windows OS
• JDK Software
• Text editor (Visual studio / Sublime / Note pad)

Procedure

The String class in Java provides numerous methods for working with strings. Here are a few examples
demonstrating the use of some common methods of the String class:

TASK 1: Concatenate Strings
//Concatenate Strings
public class StringExample1 {
public static void main(String[] args) {

String str1 = “Hello”;
String str2 = “World”;
System.out.println(“ String 1: “ + str1);
System.out.println(“ String 2: “ + str2);
// Concatenation using the concat() method
String result = str1.concat(“ “ + str2);

System.out.println(“Concatenated String: “ + result);
}
}
Explanation:

• In Java, string concatenation is the process of combining two or more strings into a single string.
• The concat() method is one way to concatenate strings in Java. It appends one string to the end of
another string.

• In the example, str1.concat(“ “ + str2) concatenates str1, a space, and str2.
• The result is a new string “Hello World”, which is stored in the variable result.
• String concatenation using the concat() method creates a new string object containing the concatenated
result. The original strings remain unchanged.

• The + operator can also be used for string concatenation in Java, as demonstrated in the println()
statements. It works similarly to the concat() method.

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