java - Eclipse插件: Finding line numbers containing a substring not working

Question

我使用以下函数来查找所有以 word 作为子字符串的行号。

    public ArrayList<Integer> find(String word, File text) throws IOException {
    LineNumberReader rdr = new LineNumberReader(new FileReader(text));
    ArrayList<Integer> results = new ArrayList<Integer>();
    try {
        String line = rdr.readLine();
        if (line.contains(word)) {        
            results.add(rdr.getLineNumber());
        }
    } finally {
        rdr.close();
    }
    return results;
}

但是，当我如下调用上述函数时，我得到的 lineNumberList 的大小为 0(假设该文件至少包含一次 word 作为子字符串)

IProject project = (IProject)((IAdaptable)firstElement).getAdapter(IProject.class);
IFile manifest = project.getFile("AndroidManifest.xml");
File manifestfile = manifest.getRawLocation().makeAbsolute().toFile();
ArrayList<Integer> lineNumberList = new ArrayList<Integer>();
lineNumberList = find(PermissionInfo[0].trim(), manifestfile);

Answer 1

循环遍历项目，即

public ArrayList<Integer> find(String word, File text) throws IOException {
    LineNumberReader rdr = new LineNumberReader(new FileReader(text));
    ArrayList<Integer> results = new ArrayList<Integer>();
    try {
        String line = rdr.readLine();
        while(line != null){
        if (line.contains(word)) {        
            results.add(rdr.getLineNumber());
        }
        line = rdr.readLine();
        }
    } finally {
        rdr.close();
    }
    return results;
}