Java - String concat() Method

The Java string concat() method returns the string which contains the specified string added to the end of the given string.

Syntax

public String concat(String str)

Parameters

str Specify a string value which need to be added to the given string.

Return Value

Returns the concatenated version of the specified string.

Example:

In the example below, concat() method is used to add the string called str2 to the end of the string called str1.

public class MyClass {
  public static void main(String[] args) {
    String str1 = "Hello";
    String str2 = " World!.";

    System.out.println(str1.concat(str2)); 
  }
}

The output of the above code will be:

Hello World!.

Example:

The example below shows how to concatenate more than two string using concat() method.

public class MyClass {
  public static void main(String[] args) {
    String str1 = "Learning";
    String str2 = " Java";
    String str3 = " is fun.";
    
    //concatenate all three strings
    String str = str1.concat(str2).concat(str3);
    //print the final string
    System.out.println(str); 
  }
}

The output of the above code will be:

Learning Java is fun.

❮ Java String Methods