|
Java™
by example!
|
|
|
How do I concatenate two Strings?
There are two ways to concatenate one string to another. The most common is to use
the (rather ambiguous) + operator:
String s1 = "Hello, ";
String s2 = "world!";
String s3 = s1 + s2;
System.out.println(s3); // prints out: Hello, world!
|
The String class also provides a method concat that does just the same:
String s1 = "Hello, ";
String s2 = "world!";
String s3 = s1.concat(s2);
System.out.println(s3); // prints out: Hello, world!
|
In the previous example, the method concat is invoked on s1. s1 remains unchanged and a completely new String
will be created. A String is immutable! Once you assigned it a value, it cannot change anymore during its lifetime.
You will always have to create a new String object.
Further Information
Author of answer: unknown
Comments to this answer are only viewable by members. Login or become a member!
|
|
|
|
|
In-house 