Java String concat() method:

Java String concat() method is used to add the given String to the end of the current String.

Syntax:

public String concat(String str)

Parameter:

Str: String to be concatenated at the end of current string.

Returns:

It returns Combined String.

Example 1: Concatenating Strings one by one

public class ConcatEx1{
public static void main(String args[]){
String s1,s2,s3="null";
s1="Tutorial";
System.out.println(s1);
s2=s1.concat("And");
System.out.println(s2);
s3=s2.concat("Example");
System.out.println(s3);
}
}

Output:

Tutorial
TutorialAnd
TutorialAndExample

Example 2: Concatenating multiple Strings

public class ConcatEx2 { 
    public static void main(String[] args) {     
        String str1 = "Welcome"; 
        String str2 = " to the"; 
        String str3 = " Tutorial And Example"; 
        // Concatenating multiple strings 
        String str5 = str1.concat(str2).concat(str3); 
        System.out.println(str5); 
    } 
}

Output:

Welcome to the Tutorial And Example

Example 3: concatenating spaces and special characters to the string object

public class ConcatEx3 { 
    public static void main(String[] args) {     
        String str1 = "welc".concat("ome");  
        System.out.println(str1);
        //adding the spaces
        String str3 = str1.concat(" ")+"to".concat(" ").concat("the").concat(" ").concat("tutorialandexample") ;
        System.out.println(str3);
        //adding the special character
        String str4 = str1.concat("!@#$%^&*()_+~{}:><?/*-+");
        System.out.println(str4);
    } 
}

Output:

welcome
welcome to the tutorialandexample
welcome!@#$%^&*()_+~{}:><?/*-+