创建一个3行4列的jframe。我试图实现一个记忆游戏,它匹配的字母。我想让它,当程序运行时,它将创建一个退出按钮和一个开始按钮,这将进入游戏。我对Jpanel和Jframe相当陌生。另一个问题是如何改变字体的大小?
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import javax.swing.border.Border;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import java.awt.Color;
import javax.swing.BorderFactory;
public class matchinggame implements ActionListener
{
JPanel jp = new JPanel(); //lets us use the variables jp
JFrame jf = new JFrame(); //lets us use the variables jf
String[] matchList = { "dank", "dank", "memes", "memes", "360", "360", "headshot", "headshot", "doge", "doge",
"mlg", "mlg",};
String[] shuffledList;
JButton[][] buttons;
int i = 0;
int cardOne;
int secIndex;
public static void main(String[] args)
{
//creates app and Gui
javax.swing.SwingUtilities.invokeLater(new Runnable() //launches a thread that will run a class later
{
public void run()
{
matchinggame app = new matchinggame();
app.makeGUI();
}
});
}
public void dealCards(JPanel panel)
{
buttons = new JButton[3][4]; // array of buttons used to represent cards
shuffleCards();
for (int i = 0; i < 3 * 4; i++) // creates 3 rows with 4 columns
{
if (i % 4 == 0)
buttons[i / 4] = new JButton[4];
buttons[i / 4][i % 4] = new JButton("choose me"); // shows cards faced down
buttons[i / 4][i % 4].addActionListener(this);
panel.add(buttons[i / 4][i % 4]);
}
}
public void shuffleCards()
{
List<String> list = Arrays.asList(matchList);
Collections.shuffle(list);
shuffledList = list.toArray(new String[list.size()]);
}
public void updateMatchList(String a, String b, boolean add)
{
String[] courseList;
int oldLen = matchList.length;
if (add) // add the new item to the list
{
courseList = new String[oldLen + 2];
courseList[0] = new String(a); // new first course
courseList[1] = new String(b); // new first course num
for (int item = 2; item <= oldLen; item += 2)
{
courseList[item] = matchList[item - 2];
courseList[item + 1] = matchList[item - 1];
}
matchList = courseList;// delete matching item
}
else
{
courseList = new String[oldLen - 2];
int matchItem = 0;
for (int item = 0; item <= oldLen; item += 2) {
if (a != matchList[item]) { // no match so OK to copy over
courseList[item] = matchList[matchItem];
courseList[item + 1] = matchList[matchItem + 1];
matchItem += 2;
}
}
matchList = courseList;
}
}
/**
* Creates the JFrame and its components.
*/
public void makeGUI()
{
JFrame frame = new JFrame("matchinggame");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jp = new JPanel(new GridLayout(3, 4));
jp.setPreferredSize(new Dimension(500, 300));
dealCards(jp);
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(jp, BorderLayout.CENTER);
// Display the window.
frame.setSize(500, 500); //creates frame
frame.setVisible(true); //shows frame
jp.setBorder(BorderFactory.createLineBorder(Color.ORANGE,16));
}
public void actionPerformed(ActionEvent e)
{
int r, c;
if (i < 2) // find the card clicked on and flip it over
{
for (r = 0; r < 3; r++)
{
for (c = 0; c < 4; c++)
{
// if the card is not face down (showing "choose me") don't
// flip it
if ((e.getSource() == buttons[r][c])
&& buttons[r][c].getText().equals("choose me"))
{
// flip the card face-up to show text from matchList
buttons[r][c].setText(shuffledList[(r * 4 + c)]);
i++; // increment number of cards flipped
if (i == 1)
cardOne = (r * 4 + c); // save which pattern was
// shown first
else
secIndex = (r * 4 + c); // save the pattern
// shown second
return;
}
}
}
} else { // 2 cards already flipped, put all cards face down
for (r = 0; r < 3; r++)
{
for (c = 0; c < 4; c++)
{
// first and second cards flipped
if (shuffledList[cardOne].equals(shuffledList[secIndex]))
{
if (!buttons[r][c].getText().equals("choose me")) //if cards dont match set this card
{
buttons[r][c].setText("dankified"); //when matched changes card
buttons[r][c].setBackground(Color.GREEN); //when matched changes color of card
buttons[r][c].setEnabled(false); //matched cards will not be able to clicked
}
} else if ((!buttons[r][c].getText().equals("dankified"))
&& (!buttons[r][c].getText().equals("choose me")))
{
// if 2 face up cards didn't match, flip face down again
buttons[r][c].setText("choose me");
}
}
i = 0; // new turn, no cards flipped face up
}
}
}
}
你只需要添加一个确认对话框,在创建框架之前进行检查
public void makeGUI() {
javax.swing.JOptionPane jOptionPane = new JOptionPane();
if(JOptionPane.showConfirmDialog(null, "start playing ?", "card memory game", 2)==0) {
JFrame frame = new JFrame("matchinggame");
//rest of your code ..
}
要更改按钮的字体,需要在dealCards方法中添加一段代码(在创建按钮之后)
buttons[i / 4][i % 4].setFont(new Font("customFont", FontConstants.ALIGN_CENTER, 24));