How to get the length of a string in Java?

In Java, you can use the `length()` method to retrieve the length of a `String` string. Here are the specific steps:

Create a variable of type `String` and assign a value to it. For example:

   String str = "Hello, World!";

2. Use the `length()` method to obtain the length of a string. For example:

   int length = str.length();

This will return the number of characters in the string `str`.

You can use this variable (`length`) in the code for subsequent operations, such as printing, conditional statements, and so on.

Here is the complete example code:

public class StringLengthExample {
    public static void main(String[] args) {
        String str = "Hello, World!";
        int length = str.length();
        System.out.println("字符串的长度为：" + length);
    }
}

When running the above code, the console will output:

字符串的长度为：13

This shows that the length of the string “Hello, World!” is 13 characters.