can anyone tell me what's the error in this rmi calculator program....... especially the clint.java.........

here when i run the rmi calculator.........i gets an applet calculator.....but for all the mathematical addition,sub,div,mul......i'm getting the null value.......i also doubt at whether the try catch is placed wrongly............

anybody please help me................

commented: patience, young grasshopper -3

help me,,,
i'm getting a java.lang.NullPointerException

start with calculator view, replace all int to double, in all classes

I don't want to help you with that longer ..., nothing special but view to GUI is correct, not nice or ....

import java.awt.event.*;
import java.awt.*;
import java.math.RoundingMode;
import java.rmi.*;
import java.text.NumberFormat;
import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JFormattedTextField;
import javax.swing.JPanel;
//<applet code=Clint.class width=200 height=200></applet>
public class Clint extends JApplet implements ActionListener {

    private static final long serialVersionUID = 1L;
    private JButton b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, ad, sb, ml, dv, eq, clr;
    private int x = 0;
    private double y = 0, z = 0, s = 0, ans;
    private double s1;
    private JFormattedTextField t1;
    private calintf ci;
    private JPanel inputPanel = new JPanel();
    private JPanel buttonPanel = new JPanel();

    @Override
    public void init() {
        inputPanel = new JPanel();
        inputPanel.setPreferredSize(new Dimension(400, 30));
        inputPanel.setLayout(new BorderLayout(5, 5));
        buttonPanel = new JPanel();
        buttonPanel.setPreferredSize(new Dimension(400, 400));
        buttonPanel.setLayout(new GridLayout(4, 4, 5, 5));
        s1 = 0;
        NumberFormat dblFormat = NumberFormat.getNumberInstance();
        dblFormat.setMinimumFractionDigits(0);
        dblFormat.setMaximumFractionDigits(9);
        dblFormat.setRoundingMode(RoundingMode.HALF_UP);

        t1 = new JFormattedTextField(dblFormat);
        t1.setValue(0);
        t1.addFocusListener(new FocusListener() {

            @Override
            public void focusGained(FocusEvent e) {
                t1.requestFocus();
                t1.setText(t1.getText());
                t1.selectAll();
            }

            @Override
            public void focusLost(FocusEvent e) {
            }
        });
        inputPanel.add(t1, BorderLayout.CENTER);
        clr = new JButton("Clr");
        clr.addActionListener(this);
        buttonPanel.add(clr);
        b1 = new JButton("1");
        b1.addActionListener(this);
        buttonPanel.add(b1);
        b2 = new JButton("2");
        buttonPanel.add(b2);
        b2.addActionListener(this);
        b3 = new JButton("3");
        buttonPanel.add(b3);
        b3.addActionListener(this);
        b4 = new JButton("4");
        buttonPanel.add(b4);
        b4.addActionListener(this);
        b5 = new JButton("5");
        buttonPanel.add(b5);
        b5.addActionListener(this);
        b6 = new JButton("6");
        buttonPanel.add(b6);
        b6.addActionListener(this);
        b7 = new JButton("7");
        buttonPanel.add(b7);
        b7.addActionListener(this);
        b8 = new JButton("8");
        buttonPanel.add(b8);
        b8.addActionListener(this);
        b9 = new JButton("9");
        buttonPanel.add(b9);
        b9.addActionListener(this);
        b0 = new JButton("0");
        buttonPanel.add(b0);
        b0.addActionListener(this);
        sb = new JButton("-");
        buttonPanel.add(sb);
        sb.addActionListener(this);
        ad = new JButton("+");
        buttonPanel.add(ad);
        ad.addActionListener(this);
        ml = new JButton("*");
        buttonPanel.add(ml);
        ml.addActionListener(this);
        dv = new JButton("/");
        buttonPanel.add(dv);
        dv.addActionListener(this);
        eq = new JButton("=");
        buttonPanel.add(eq);
        eq.addActionListener(this);
        setLayout(new BorderLayout(5, 5));
        setPreferredSize(new Dimension(600, 600));
        setLayout(new BorderLayout(5, 5));
        add(inputPanel, BorderLayout.NORTH);
        add(buttonPanel, BorderLayout.CENTER);
        setVisible(true);
    }

and debug that with System.out.println(tested value)

y = (((Number) t1.getValue()).doubleValue());

hey i want the attached rmi program to be corrected.............the above code is not in rmi format

are you done with:

1/ start with calculator view
2/ replace all int to double, in all classes
3/ get number value from JForrmatedTextField

I think that you're shot to the dark, haven't you, because a.m. changes could *** (upTo) half hour

now I'm outta from this thread,

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