从JTextField获取布尔值

Question

I am trying to take the values from the text fields below to use with parent.addNewRoom(roomNo,roomEnSuite); but roomEnSuite is a Boolean value in the parent class. What is the correct procedure to get a Boolean from a JTextField?

public void actionPerformed( ActionEvent ae)     
    {
        String item = ae.getActionCommand(); 

        if ( item.equals("Confirm"))         
        {
            String roomNo = nameJTextField.getText();
            String roomEnSuiteS = idJTextField.getText();
            parent.addNewRoom(roomNo,roomEnSuite);
            this.dispose();
        }
        else if ( item.equals("Cancel"))        
        {
        parent.resetButtons();
        this.dispose();
    }
}

Answer 1

To give a full answer from my above comments:

Handling boolean input using a JTextField would not be a good way to go about things as there are many variations the user could type yes / no / true / false , etc. mispelling?

Using a JRadioButton (for single answers) or JCheckbox (for multiple answers) would be a better way to go about handling true or false input. I would suggest a JRadioButton as you wouldn't want the user checking true and false .

http://docs.oracle.com/javase/tutorial/uiswing/components/button.html

Answer 2

假设用户输入字符串true或false ，则可以使用以下命令将其转换为boolean ：

boolean value = Boolean.parseBoolean(idJTextField.getText());

Answer 3

A JTextField is meant to provide String s. So unless you want the user to type true or false in the textfield (or whatever string you will parse to a boolean), there are better options available

• a JCheckBox , which is typically used for toggle settings, like true-false
• JRadioButton s (one for each setting, so two in this case)

And here a link to the corresponding Swing tutorial with examples on how to use these buttons

But if you really want to got with a textfield, then you should get the text from it and parse it by using for example Boolean.valueOf

Answer 4

只要输入的值始终为true或false，就可以使用布尔值；

boolean value = Boolean.parseBoolean(enSuiteJTextField.getText());