Java - File Reading/Writing

Question

I got some java files in my workspace. Now i want to write a java program which would read a text file coming from a different source, one at a time, line by line and insert those lines into respective java files in the workspace .

The text file would say me which file to insert into which ".java" class.

For example I have AddressType.Java in my workspace with getters, setters

I got a text file namely AddressType.txt which has some additional methods, comments, instance variables etc etc which should actually go and sit into the body of the AddressType.Java file.

For this i have a logic in my mind and its sort of working. I know how to read/write to files. Here is my problem. My approach is to replace the ending bracket } in AddressType.Java with a space and then pull the contents of AddressType.txt into AddressType.java and then close the } again.

Can some one help me how to find EOF } in a .java file using a java program.

I cannot do this manually as I have 100's of java files and text files to move content to.

Please help. I hope some one understands this question.

Nothing is run time. Everything is compile time itself. I mean i need to merge the txt file contents into java file and then compile and ship the java files.

Answer 1

You can read the entire java text file into memory and remove the last } that way. Classes can't be very big. ie less than a few MB. And you can do this with IOUtils.toString() in one line.

String textWithoutLast = IOUtils.toString(
      new FileInputStream(javaFilename)
      ).replaceAll("}\\s*$","");

This removes the last } with any amount of spaces, tabs or new lines after it.

Answer 2

你必须计算开口{ s和关闭}一旦你有相同的数字你找到了结束的...

Answer 3

熟悉编写Eclipse插件的人可能能够扩展现有的代码格式化程序插件来执行此操作。