java - 如何使用循环清除jframe的所有文本字段？

Question

我正在使用 NetBeans 开发 Java 应用程序。我有 5 个JTextFields和 2JTextArea个JFrame。我想使用循环一次清除它们。怎么做到呢？

Answer 1

遍历所有组件并将所有JTextField和JTextArea对象的文本设置为空字符串：

//Note: "this" should be the Container that directly contains your components
//(most likely a JPanel).
//This won't work if you call getComponents on the top-level frame.
for (Component C : this.getComponents())
{    
    if (C instanceof JTextField || C instanceof JTextArea){

        ((JTextComponent) C).setText(""); //abstract superclass
    }
}

Answer 2

适当的代码应该是这个

    Component[] components = jframe.getContentPane().getComponents();
    for (Component component : components) {
        if (component instanceof JTextField || component instanceof JTextArea) {
            JTextComponent specificObject = (JTextComponent) component;
            specificObject.setText("");
        }
    }