匿名类如何具有参数？ [英] How can an anonymous class have arguments?

问题描述

我不是一个java人，但我继承了一些代码，我需要补丁。我把源代码转换成netbeans，我得到的错误：Anonymous类实现接口;

 执行者背景= Executors.newSingleThreadExecutor（）; 
 Runnable mylookupThread = new Runnable（FilePath，SearchIndex）
 {
 public void run（）
 {MainWindow.this.processFile（this.val $ FilePath）; 
 Thread t = new Thread（new lookupThread（MainWindow.arrFile，true，false，this.val $ SearchIndex））; 
 t.setName（Lookup）; 
 t.setPriority（10）; 
 t.start（）; 
} 
}; 
 background.execute（mylookupThread）; 
 Executors statusThread = Executors.newSingleThreadExecutor（）; 
 Runnable myStatusThread = new Runnable（）
 {
 public void run（）
 {MainWindow.this.updateStatus（）; 
} 
}; 
 statusThread.execute（myStatusThread）; 
  

错误在第二行弹出。帮助？

解决方案

使 mylookupThread 单独的类，并传递给 Executor ：

  class LookupTask implements Runnable {
 private final String filePath，searchIndex; 
 LookupTask（String filePath，String searchIndex）{
 this.filePath = filePath; 
 this.searchIndex = searchIndex; 
} 
 
 public void run（）{...} 
} 
 ... 
 background.execute（new LookupTask（filePath，searchIndex） ）; 
  

其他方法是使 filePath，searchIndex final：

  final String filePath = ... 
 final String searchIndex = ... 
执行器background = Executors.newSingleThreadExecutor（）; 
 Runnable mylookupThread = new Runnable（）{
 public void run（）{MainWindow.this.processFile（filePath）; 
 Thread t = new Thread（new lookupThread（MainWindow.arrFile，true，false，searchIndex））; 
 t.setName（Lookup）; 
 t.setPriority（10）; 
 t.start（）; 
} 
}; 
 background.execute（mylookupThread）; 
  

I'm not a java guy but I've inherited some code I need to patch up. I pulled the source into netbeans and I'm getting the error: Anonymous class implements interface; cannot have arguments.

Here's the code:

Executor background = Executors.newSingleThreadExecutor();
Runnable mylookupThread = new Runnable(FilePath, SearchIndex)
{
    public void run()
    { MainWindow.this.processFile(this.val$FilePath);
        Thread t = new Thread(new lookupThread(MainWindow.arrFile, true, false, this.val$SearchIndex));
        t.setName("Lookup");
        t.setPriority(10);
        t.start();
    }
};
background.execute(mylookupThread);
Executor statusThread = Executors.newSingleThreadExecutor();
Runnable myStatusThread = new Runnable()
{
    public void run()
    { MainWindow.this.updateStatus();
    }
};
statusThread.execute(myStatusThread);

The error pops up on the second line. Help?!?

解决方案

Make mylookupThread separate class, make it's instance and pass it to Executor:

class LookupTask implements Runnable {
    private final String filePath, searchIndex;
    LookupTask(String filePath, String searchIndex) {
       this.filePath = filePath;
       this.searchIndex = searchIndex;
    }

    public void run() { ... } 
}
...
background.execute(new LookupTask(filePath, searchIndex));

Other way around is to make filePath, searchIndex final:

final String filePath = ...
final String searchIndex = ...
Executor background = Executors.newSingleThreadExecutor();
Runnable mylookupThread = new Runnable() {
    public void run() { MainWindow.this.processFile(filePath);
        Thread t = new Thread(new lookupThread(MainWindow.arrFile, true, false, searchIndex));
        t.setName("Lookup");
        t.setPriority(10);
        t.start();
    }
};
background.execute(mylookupThread);

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