To add a backslash () character into a string in Java, you can use the escape sequence "" to represent a single backslash character in the string.
Here is an example of how you can add a backslash character into a string in Java:
String str = "C:\\Windows\\System32";
In this example, the string str contains the path "C:\Windows\System32", and the backslash characters are escaped using the "" escape sequence.
Alternatively, you can use a raw string literal to define the string, which allows you to include backslash characters in the string without the need to escape them.
To use a raw string literal, you need to put the string between triple quotes (""").
Here is an example of how you can use a raw string literal to define a string with backslash characters in Java:
String str = """C:\Windows\System32""";
In this example, the string str contains the path "C:\Windows\System32", and the backslash characters are included in the string without the need to escape them.
It is important to note that raw string literals are a new feature in Java 15, and they are not available in earlier versions of Java.
It is also important to note that the backslash character is used as an escape character in Java, and it has special meaning in certain contexts.
For example, the "\n" escape sequence represents a newline character, and the "\t" escape sequence represents a tab character.
Therefore, you should be careful when using backslash characters in strings, and make sure to escape them properly when necessary.