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Thread: ActionListener

  1. #1
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    Default ActionListener

    Now I am having problems with the actionListener. How do I get it to work so that the volume takes all variables?

    import javax.swing.*;
    import java.awt.*;
    import java.awt.event.*;
    import java.text.DecimalFormat;
    import java.awt.Container;

    public class rectangularSolid extends JApplet implements ActionListener {

    public void init() {

    String in = JOptionPane.showInputDialog("1(volume),2(surface area),3(diagonal)");
    int input = Integer.parseInt(in);

    switch(input) {

    case 1:
    JLabel prompt;
    JLabel prompt2;
    JLabel prompt3;
    JLabel prompt4;
    Container c = getContentPane();
    c.setLayout(new FlowLayout());
    JTextField insert;
    JTextField insert2;
    JTextField insert3;
    JTextField insert4;
    prompt = new JLabel("enter length");
    insert = new JTextField(10);
    c.add(prompt);
    c.add(insert);
    prompt2 = new JLabel("enter width");
    insert2 = new JTextField(10);
    c.add(prompt2);
    c.add(insert2);
    prompt3 = new JLabel("enter height");
    insert3 = new JTextField(10);
    c.add(prompt3);
    c.add(insert3);
    insert.addActionListener(this);
    insert2.addActionListener(this);
    insert3.addActionListener(this);
    break;
    case 2:
    JTextArea outputArea;
    outputArea = new JTextArea(2,10);
    Container c1 = getContentPane();
    c1.add(outputArea);
    DecimalFormat twoDigits = new DecimalFormat("0.00");
    String sa = JOptionPane.showInputDialog("enter length");
    double length2 = Double.parseDouble(sa);
    String w2 = JOptionPane.showInputDialog("enter width");
    double width2 = Double.parseDouble(w2);
    String h2 = JOptionPane.showInputDialog("enter height");
    double height2 = Double.parseDouble(h2);
    String output = "";
    output = (" Surface area = "
    + twoDigits.format(surfaceArea(length2,width2,height 2)));
    outputArea.setText(output);
    JOptionPane.showMessageDialog(null,outputArea,null ,
    JOptionPane.INFORMATION_MESSAGE);
    break;}
    }
    public void actionPerformed(ActionEvent e ) {
    double length = Double.parseDouble(e.getActionCommand() );
    double width = Double.parseDouble(e.getActionCommand());
    double height = Double.parseDouble(e.getActionCommand());
    showStatus("Volume is " + volume ( length, width, height ) );
    }
    public double volume(double length, double width, double height) {
    return length * width * height;
    }
    public double surfaceArea(double length2, double width2, double height2) {
    return ( 2 * length2 * width2 + 2 * length2 * height2 + 2 * width2 * height2);

    }
    }


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: ActionListener

    You start by wrapping your code in highlight tags, which you've been asked to do in previous posts.
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
    Static Void Games - Play indie games, learn from game tutorials and source code, upload your own games!

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