Java 从对话框中获取文本？

我试图从程序创建的弹出窗口中获取值。事情是这样的：

private void btnCheckoutActionPerformed(java.awt.event.ActionEvent evt) {                                            


    do
        JOptionPane.showInputDialog("Enter item price","");
        itemPrice = Double.parseDouble() 

    while();

---

那么如何从输入对话框中获取文本呢？

自JOptionPane.showInputDialog。。返回一个字符串您只需将其声明为如下所示的字符串

String input = JOptionPane.showInputDialog("Enter item price","");

试试这个

private void btnCheckoutActionPerformed(java.awt.event.ActionEvent evt) {                                            

do
    String value = JOptionPane.showInputDialog("Enter item price","");
    itemPrice = Double.parseDouble(value) 

while();

}

showInputDialog返回文本输入的字符串或组合框选择的对象。看

boolean valid = false;
do {
    try {
        itemPrice = Double.parseDouble(JOptionPane.showInputDialog("Enter item price"));
        valid = true;
    } catch (NumberFormatException e) {}
} while(!valid);