java How to use jbuttons to input to a text field in java?

[Shammikit]

How to use jbuttons to input to a text field in java?

[Castdeath97]

Too difficult to read without indentation. Use the code button (the "<>" thing near the quote button and choose the C option) to write the java in like this:

 

Public class Example(){
  private example; 
}

 

[Shammikit]

3 minutes ago, Castdeath97 said:

Too difficult to read without indentation. Use the code button (the "<>" thing near the quote button and choose the C option) to write the java in like this:

 

Public class Example(){
  private example; 
}

 

ok

[vorticalbox]

 textArea.insert("2",0); will insert to place 0 or the start of the string you need to insert to the end of the string. You will need to find the length of the teat area then  textArea.insert("2",length -1);

 

[Castdeath97]

3 minutes ago, Shammikit said:

ok

Add spaces between the buttons as well, still a bit hard to read.

[Shammikit]

1 minute ago, vorticalbox said:

 textArea.insert("2",0); will insert to place 0 or the start of the string you need to insert to the end of the string. You will need to find the length of the teat area then  textArea.insert("2",length -1);

 

since this is a calculator the user should be able to enter numbers in any order.if i made it this way i can only enter numbers from 1 to 9 in ascending order right

[Shammikit]

5 minutes ago, Castdeath97 said:

Add spaces between the buttons as well, still a bit hard to read.

done 

 

[vorticalbox]

4 minutes ago, Shammikit said:

since this is a calculator the user should be able to enter numbers in any order.if i made it this way i can only enter numbers from 1 to 9 in ascending order right

no to will add what they pressed to the end of the string.

[Shammikit]

 

10 minutes ago, vorticalbox said:

 textArea.insert("2",0); will insert to place 0 or the start of the string you need to insert to the end of the string. You will need to find the length of the teat area then  textArea.insert("2",length -1);

 

doing this way im able to type in12 but im not able to type 21

[Fetzie]

Why not use Getters and Setters in a data-holding class?

 

This is what I wrote for "my first calculator" (so it might not be perfect, but it works how you want it to):

 

public class Calculator{

private String textFieldContents = "0";

 

public String getTextFieldContents() {
        return textFieldContents;
    }


    public void setTextFieldContents(String textFieldContents) {
        this.textFieldContents = textFieldContents;
    }

 

This would be the "1" button and the text field:

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import Calculator;

public class CalculatorUI extends Calculator implements ActionListener {

    protected Calculator calc = new Calculator();

    private JButton numberButton1;

    private JTextArea resultTextArea;
    private JPanel basePanel;

    private String textFieldContents = calc.getTextFieldContents();

 

    // putting it in the constructor cause I'm a lazy fuck 

    public CalculatorUI() {

 

        resultTextArea = new JTextArea();
        resultTextArea.setBounds(20, 50, 340, 40);
        resultTextArea.setBackground(Color.WHITE);
        resultTextArea.setEnabled(true);
        resultTextArea.setEditable(false);
        resultTextArea.setSelectedTextColor(Color.BLACK);

 

        numberButton1 = new JButton("1");
        numberButton1.setText("1");
        numberButton1.setBounds(20, 100, 50, 50);
        numberButton1.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                if (calc.getTextFieldContents().equals("0")) {
                    textFieldContents = "1";
                    resultTextArea.setText(textFieldContents);
                    entryTrackerLabel.setText(textFieldContents);
                    calc.setTextFieldContents(resultTextArea.getText());
                } else {
                    textFieldContents = (calc.getTextFieldContents() + "1");
                    resultTextArea.setText(textFieldContents);
                    entryTrackerLabel.setText(entryTrackerLabel.getText()+"1");
                    calc.setTextFieldContents(resultTextArea.getText());
                }
            }
        });

 

        // add elements to panel
        basePanel = new JPanel();
        basePanel.setLayout(null);
        basePanel.setSize(360, 400);

        basePanel.add(resultTextArea);
        basePanel.add(numberButton1);

}

 

And then convert the text field into a double or float type to do your maths.