Java 为什么我会出现内存不足错误

我一直在这个文件上得到一个OutOfMemory错误，我不知道为什么

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;

public class Sgrep {

    private String name;
    public String field2;
    public String go;
    File File;
    public String end;

    Sgrep(String File0, String first) {
        go = File0;
        File = new File(File0);
        name = first;
    }

    public String getFilename() {
        return go;
    }

    public String search() {
        try {
            if (name == null) {
                System.out.println("You cannot give a null string.");
            }

            BufferedReader yo = new BufferedReader(new FileReader(File));

            StringBuffer bruh = new StringBuffer();
            String line = null;
            while ((line = yo.readLine()) != null) {
                while (line.indexOf(name) > 0) {
                    bruh.append(line); // here is the first error
                }

                yo.close();
                end = bruh.toString();
            }
        } catch (FileNotFoundException e) {
            return name + "There is a FileNotFoundExcpetion error. This could happen for various reasons, such as the file not being there, or else being read protected from you, or for example being a directory rather than a file.";
        } catch (Exception e) {
            return "You have an io exeption.";
        }
        return end;
    }
}

在这个问题上

public class TesterClass{
    public static void main(String[] args){
    if(args.length != 2){

    System.out.println("Usage: java Sgrep <string> <filename>");
    return;

    }
    Sgrep task = new Sgrep(args[0],args[1]); 
    System.out.println(task.getFilename());
    System.out.println(task.search()); // here is the error

    }
}

---

有人知道这是为什么吗？

此循环将一次又一次地将相同的

字符串添加到
StringBuffer
（假设条件为
true
），直到内存耗尽：

while (line.indexOf(name) > 0)
{
    bruh.append(line); // here is the first error
}

换成

if (line.indexOf(name) > 0)
{
    bruh.append(line);
}

以便只添加一次。
可能重复的
if (line.indexOf(name) > 0)
{
    bruh.append(line);
}