Concatenation in Java 20

Concatenation is the process of joining two or more strings together to form a single string. In Java, you can concatenate strings using the "+" or "+=" operators, or by using the concat() method. Here are some examples:

Using the "+" operator:

String str1 = "Hello";

String str2 = "world";

String result = str1 + " " + str2; // Concatenates str1, a space, and str2

System.out.println(result); // Outputs "Hello world"

Using the "+=" operator:

String str1 = "Hello";

str1 += " world"; // Concatenates " world" to the end of str1

System.out.println(str1); // Outputs "Hello world"

Using the concat() method:

String str1 = "Hello";

String str2 = "world";

String result = str1.concat(" ").concat(str2); // Concatenates str1, a space, and str2

System.out.println(result); // Outputs "Hello world"