Java intercepts the last few characters of a string

The String class in Java provides asubstring(int from, int to)method for intercepting the position from from to to-1 in the string character.

Because the character position of the string starts from 0, and the substring(int from, int to) method is closed in the front and open in the back, that is, [from, to), which can be understood as [from, to- 1]. At the same time, to can be omitted (polymorphism). By default, to intercepts the last digit of the string.

To intercept the last few characters in the string, you can first obtain the length of the string, and use the length-n of the string as the first parameter of the substring() method to intercept the string. The effect of the last n characters.

Example:

String str = "i like yanggb"; System.out.println(str.substring(str.length() - 6)); // yanggb

Also note that String in Java is an immutable type, so the substring() method does not change the original string, but returns a new one. String.

System.out.println(str); // i like yanggb

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