Java uses the lineSeparator() function of the System class to obtain the system's newline character

Java uses the lineSeparator() function of the System class to obtain the system's newline character

In programming, print output often needs to include the correct newline character to ensure the readability of the output. Different operating systems have different ways of expressing line breaks. For example, in Windows systems, "
" is used to represent line breaks, while in Linux or Mac systems, "
" is used. to represent a newline character.

In order to correctly obtain line breaks in different operating systems, Java provides the lineSeparator() function of the System class. The lineSeparator() function can return the correct newline character according to the current operating system's newline representation.

The following is a simple sample code:

public class LineSeparatorDemo {
    public static void main(String[] args) {
        String lineSeparator = System.lineSeparator();
        System.out.println("当前操作系统的换行符为：" + lineSeparator);
    }
}

In the above code, we call the lineSeparator() function of the System class and save the returned newline character in the lineSeparator variable. Then, print out the newline character of the current operating system through the System.out.println() function.

Next, let’s run this code on Windows, Linux and Mac systems respectively to see what the output is.

Run this code on Windows system, the output result is as follows:

当前操作系统的换行符为：

Run this code on Linux or Mac system, the output result is as follows:

当前操作系统的换行符为：

From the output result you can It can be seen that the System.lineSeparator() function can indeed return the correct newline character according to different operating systems.

In actual development, we can use the System.lineSeparator() function to achieve cross-platform line break output. For example, when we need to write a piece of text to a file, we can use the System.lineSeparator() function to obtain the newline character of the current operating system and use the newline character when writing the file, thereby ensuring that the text is read properly on different operating systems. The format is correct.

To summarize, Java's System class provides the lineSeparator() function to obtain the newline character of the current operating system. By using this function, we can easily implement cross-platform newline output and improve the portability of the code.

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