Question

所以我在我的代码中尝试catch (NumberFormatException ex)：

private void Processes() throws IOException, InterruptedException {
    // New Thread "processesThread" will start here.
    final Object mon = threadBlock;
    Thread processesThread = new Thread(new Runnable() {
        @Override
        public void run() {
            synchronized (mon) {
                try {
                    try {
                        try {
                            Runtime rt = Runtime.getRuntime();
                            // "runnableTogether" will be the number that the user inputs in the GUI.
                            switch (runnableTogether) {
                                case 4:
                                processes.add(rt.exec("C:/Windows/System32/SoundRecorder.exe"));
                                case 3:
                                processes.add(rt.exec("C:/Windows/System32/taskmgr.exe"));
                                case 2:
                                processes.add(rt.exec("C:/Windows/System32/notepad.exe"));
                                case 1:
                                processes.add(rt.exec("C:/Windows/System32/calc.exe"));
                                Thread.sleep(5000);
                                destroyProcesses(processes);
                                break;
                                default:
                                invalidInput();
                                break;
                            }
                            mon.wait();
                            } catch (IOException ex) {
                        }
                        } catch (InterruptedException ex) {
                    }
                    } catch (NumberFormatException ex) {
                    nullInput();
                }
            }
        }
    });

但它给了我这个错误：

Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: ""
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
        at java.lang.Integer.parseInt(Integer.java:504)
        at java.lang.Integer.parseInt(Integer.java:527)
        at tf2_account_chief.TF2_Account_Chief.actionPerformed(TF2_Account_Chief.java:425)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
        at java.awt.Component.processMouseEvent(Component.java:6505)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)

我在这里做错了什么？有什么想法吗？

更新：以下是完整代码的PasteBin link！

Answer 1

当异常的堆栈跟踪显示时，上面的代码不会抛出异常，而是通过类actionPerformed()的{{1}}方法抛出异常，该方法在某处调用f2_account_chief.TF2_Account_Chief。 / p>

为什么我的NumberFormatException没有被我的try-catch捕获？

1 个答案: