Swing员工重写进程<T，V>

Question

我试图重写process()方法，以确保某些代码在EDT中运行。我确保了<T,V>自始至终都是匹配的，但它仍然不允许我覆盖。这是我的代码：

final SwingWorker<ArrayList<Block>,Integer[]> swingSlaveLabourer = new SwingWorker<ArrayList<Block>, Integer[]>() {

    @Override 
    protected ArrayList<Block> doInBackground() throws Exception {
        blockList.doHeavyWork()..
        Integer [] status = new Integer[2];
        status[0] = 1;
        status[1] = 0;
        this.process(status);
        return blockList;
    }

    @Override //wont allow override
    protected void process (Integer[] chunks){
        progressBar.setValue(chunks[0]);
    }
};

Answer 1

process方法以List<V>作为参数。它表示已发布的所有数据块。您需要将代码更改为：

@Override
protected void process(List<Integer[]> chunks) {
    // do something
}

不应该从process方法直接调用doInBackground。相反，您应该调用publish来发布每个数据块。

请参阅取自SwingWorker Javadoc的以下示例：

class PrimeNumbersTask extends SwingWorker<List<Integer>, Integer> {

     PrimeNumbersTask(JTextArea textArea, int numbersToFind) {
         //initialize
     }

     @Override
     public List<Integer> doInBackground() {
         while (! enough && ! isCancelled()) {
                 number = nextPrimeNumber();
                 publish(number); // each computed number is published
                 setProgress(100 * numbers.size() / numbersToFind); // and progress updated
             }
         }
         return numbers;
     }

     @Override
     protected void process(List<Integer> chunks) {
         // in the mean while, we print each published value to a textarea
         for (int number : chunks) {
             textArea.append(number + "\n");
         }
     }
 }