问如何从几个线程读取或修改用户界面上的java控件？

EN

// from a button
actionPerformed()
    // enable procedure control buttons pause and cancel at this point
    SomeProcedure ProcTh = new SomeProcedure(aTable)
    ProcTh.Start();
    ProcessLog LogTh = new ProcessLog(aTable, aProgressBar)
    LogTh.Start();
    // inside try catch:
    ProcTh.join();
    LogTh.join();

class SomeProcedure extends Thread
    JTable aTable = null;
    // the executable part
    public void run()
        for (int i=0;i<aTable.getRowCount();i++)
            // process data in a row
            while (Paused &&! Canceled)
                wait(); // inside a try catch
            if (Canceled)
                i=aTable.getRowCount()-1; // maybe a break is better??
    // the constructor part initializes things
    public SomeProcedure (JTable T)
        aTable = T; 

class ProcessLog extends Thread
    JTable aTable = null;
    JProgressBar aBar = null;
    // the executable part
    public void run()
        while (sofarlong<totallong)
            aBar.setValue((int)(sofarlong/totallong));
            // also update values in aTable
    // the constructor part
        public ProgressLog (JTable T, JProgressBar B)
            aTable = T;
            aBar = B;