[Solved] Java: I getting many errors in this program? I’m trying to create calculator [closed]

by


You have declared class level variables, but you are not using them, you are creating local variables in main() with the same name, these variables are not the same as class level variables.

Instead of doing stuffs like this JTextPane ta = new JTextPane(); you should do this.ta = new JTextPane();

This code should fix that, however, it won’t do your calculator logic.

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

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextPane;

public class MyCal implements ActionListener {

    JButton jb;
    JTextPane ta5;
    JTextPane ta4;
    JTextPane ta3;
    JTextPane ta2;
    JTextPane ta1;
    JTextPane ta;

    int add = 9, mul, div, sub, num, num1;

    MyCal ()

    {
        JFrame jf = new JFrame();

        jb = new JButton("Calculate");
        jb.setBounds(80, 145, 100, 40);
        jb.addActionListener(this);

        this.ta = new JTextPane();
        ta.setBounds(80, 30, 100, 40);

        // ta.setText("First Number");

        this.ta1 = new JTextPane();
        ta1.setBounds(80, 100, 100, 40);

        // ta1.setText("Second Number");

        this.ta2 = new JTextPane();
        ta2.setText("Addition");
        ta2.setBounds(10, 200, 50, 30);

        this.ta3 = new JTextPane();
        ta3.setText("Subtraction");
        ta3.setBounds(70, 200, 50, 30);

        this.ta4 = new JTextPane();
        ta4.setText("Multiplication");
        ta4.setBounds(130, 200, 50, 30);

        this.ta5 = new JTextPane();
        ta5.setText("Division");
        ta5.setBounds(190, 200, 50, 30);

        jf.add(ta);
        jf.add(ta1);
        jf.add(jb);
        jf.add(ta2);
        jf.add(ta3);
        jf.add(ta4);
        jf.add(ta5);

        jf.setSize(300, 300);
        jf.setLayout(null);
        jf.setVisible(true);

    }

    public static void main(String[] args) {

        new MyCal();

    }

    @Override
    public void actionPerformed(ActionEvent e) {

        ta3.setText("Hello");
    }

}

0

solved Java: I getting many errors in this program? I’m trying to create calculator [closed]