Here is a Java program to concatenate two strings using concat method. In this java program, to concatenate two strings we will first ask user to enter two strings and then concatenate both strings and print it on screen.
For Example,First String : Tech
Second String : CrashCourse
Concatenated String : TechCrashCourse
Here we are going to use approaches for string concatenation, first is by calling append() method of StringBuilder class and second is by calling concat() method of String class.
Java program to concatenate two strings using concat and append methods
package com.tcc.java.programs;
import java.util.Scanner;
public class ConcatenateString {
public static void main(String args[]) {
String str1, str2;
Scanner scanner = new Scanner(System.in);
System.out.println("Enter first String");
str1 = scanner.nextLine();
System.out.println("Enter second String");
str2 = scanner.nextLine();
// Concatenating str1 and str2 using String Builder
StringBuilder str3 = new StringBuilder(str1);
str3.append(str2);
System.out.println("Concatenated String : "
+ str3);
// Concatenating str1 and str2 using concat method
System.out.println("Concatenated String : "
+ str1.concat(str2));
}
}
Output
Enter first String Tech Enter second String CrashCourse Concatenated String : TechCrashCourse Concatenated String : TechCrashCourse
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