如何清除JPanel中的所有输入字段 [英] How to clear all input fields within a JPanel

问题描述

在 JPanel 中提交记录后，有没有办法清除所有输入字段(JTextField、JComnboBox 等)?

Is there a way to clear all input fields (JTextField, JComnboBox, etc) after record submission within a JPanel ?

目前我所做的是访问每个组件并单独使用setText("")等

Currently what I do is, to access to each component and individually use the setText(""), etc.

推荐答案

也许是这样的:

for(JComponent control : parentPanel.getComponents())
{
    if(control instanceof JTextField)
    {
        JTextField ctrl = (JTextField) control;
        ctrl.setText("");
    }
    else if (control instanceof JComboBox)
    {
        JComboBox ctr = (JComboBox) control;
        ctrl.setSelectedIndex(0);
    }
}

这应该遍历 JPanel 中的每个组件并检查该组件是 JTextField 还是 JComboBox 并相应地重置.

This should iterate over each component within the JPanel and check if the component is a JTextField or a JComboBox and reset accordingly.

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