如何在 Java 中使用 String 或 StringBuilder 进行逆序搜索？

Question

Can you please tell me how to search in reveres order (backward search) in Java?

I need to do same for searching in HTML file as text.

Answer 1

[...] how to search in reveres order (backward search) in java?

I assume you mean search for a string starting from the end.

For this task you can use String.lastIndexOf(str) . This will locate the last index of the substring str . If you want to keep searching from that point, you can add a second fromIndex argument.

The exact same methods exist for StringBuilder as well.

Answer 2

if want to search in file 1. Open file in random access mode. 2. go to end of file. 3. then search in string.