String Concatenation in Java

In this tutorial, we are going to see how to concatenate two strings in Java.

In java, the concatenation of strings forms a new string which is the combination of several strings. There are two ways to concatenate a string in Java:

• By using the operator +
• By using the concat() method

 

Method 1 : By using the operator +

public class Main {
	public static void main(String args[]){
		String str = "Hello" + " World!";
		System.out.println(str);
	}
}

Output:

Hello World!

The concatenation operator can concatenate not only strings but also primitive values.

public class Main {
	public static void main(String args[]){
		String str = "Hello" + " World!" + 3 + 4;
		System.out.println(str);
	}
}

Output:

Hello World!34

 

Method 2 : By using the concat() method

public class Main {
	public static void main(String args[]){
		String str1 = "Hello";
		String str2 = " World!";
		String res = str1.concat(str2);
		System.out.println(res);
	}
}

Output:

Hello World!

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