The class to make dialog boxes is class option pane and it is in javax.swing.*;
Here are some examples:
//Show a warning dialog with the options OK, CANCEL, title 'Warning', // and message 'Click OK to continue': Object [] options = {"OK", "CANCEL"}; JOptionPane.showOptionDialog (null, "Click OK to continue", "Warning", JOptionPane.DEFAULT_OPTION, JOptionPane.WARNING_MESSAGE, null, options, options [0]); |
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//Show an error dialog that displays the message, 'alert': JOptionPane.showMessageDialog (null, "alert", "alert", JOptionPane.ERROR_MESSAGE); |
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//Get the user's name String input = JOptionPane.showInputDialog ("Please enter your name"); |
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//Show a dialog asking the user to select from a combobox: String [] possibleValues = {"First", "Second", "Third"}; String selectedValue = (String) JOptionPane.showInputDialog (null, "Choose one", "Input", JOptionPane.INFORMATION_MESSAGE, null, possibleValues, possibleValues [0]); |
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//Show an information panel with the options yes/no and message // 'choose one': input2 = JOptionPane.showConfirmDialog (null, "choose one", |
Note also that you can get input from optionpanes. For example, the following code could appear in an actionPerformed method:
//Show an information panel with the options yes/no and message 'choose one': String input2 = JOptionPane.showConfirmDialog (null, "choose one", "choose one", JOptionPane.YES_NO_OPTION);
//Show a dialog asking the user to select from a combobox: String [] possibleValues = {"First", "Second", "Third"}; String selectedValue = (String) JOptionPane.showInputDialog (null, "Choose one", "Input", JOptionPane.INFORMATION_MESSAGE, null, possibleValues, possibleValues [0]);
showStatus ("Yes or No Option: " + input2 + " Combo Box Option:" + selectedValue);
Note that optionpanes always return strings. In cases where a number is returned, you must use Integer.parseInt() to get the int out of the string.
JOptionPane.showMessageDialog (null, "* * * I N S T R U C T I O N S * * * \n \n" + "The purpose of this very exciting game is to \n" + " guess whether the coin is a head or a tail. \n" + " when it is next flipped. \n" + "If you guess correctly, you get a point. \n \n" + "You can reset at any time by clicking CLEAR.\n \n" + "Have fun!", "Instructions", JOptionPane.QUESTION_MESSAGE);
JOptionPane.showMessageDialog (null, "Hi!", "GREETINGS", JOptionPane.QUESTION_MESSAGE);
Change the part highlighted to have one of the following graphics:
QUESTION_MESSAGE | |
WARNING_MESSAGE | |
ERROR_MESSAGE | |
INFORMATION_MESSAGE |
The Java Doc for Option Panes: http://java.sun.com/j2se/1.3/docs/api/javax/swing/JOptionPane.html
import java.applet.*; import java.awt.*; import javax.swing.*;
public class cat extends Applet {
public void init () { JOptionPane.showMessageDialog (null, createImageIcon ("lion.gif"), "A Lion", JOptionPane.INFORMATION_MESSAGE); }
/** Makesanimageiconto go on a button @parampathisavalid path to a jpg or gif image @returnanImageIcon,ornull if the path was invalid. Directlyfrom:http://java.sun.com/docs/books/tutorial/uiswing/components/example-1dot4/index.html#RadioButtonDemo */ protected static ImageIcon createImageIcon (String path) { //change the red to your class name java.net.URL imgURL = cat.class.getResource (path); if (imgURL != null) { return new ImageIcon (imgURL); } else { System.err.println ("Couldn't find file: " + path); return null; } } }