How do I concatenate strings in Java?

How do I concatenate strings in Java?

In Java, you can concatenate strings using the '+' operator or the String.concat() method. Would you like an example?

Yes, please provide an example using both methods.

Sure! Using the '+' operator: String str1 = "Hello"; String str2 = "World"; String result = str1 + " " + str2; // result is "Hello World"

Using String.concat(): String result2 = str1.concat(" ").concat(str2); // result2 is also "Hello World".

Are there any performance differences between these methods?

Yes, using the '+' operator is generally fine for a few strings, but for many concatenations, consider using StringBuilder for better performance.