Java屏幕是空白的
正如标题所说，我的java屏幕一直是空白的。我想让它显示类的形状和两个标签。如果你想看另一个关于画线和X的类，请告诉我。这就是我到目前为止所做的： ---编辑--- 既然你给了我建议，我已经取得了一些进展。我已经从Shapes的paint方法中删除了一段相当不错的代码，并将其移动到另一个方法或一个新类中以保持其干净。形状仍然是空白页，但事情看起来更好。另外，请不要粘贴答案代码。作为一名学生，我被指示不要复制代码。诸如“为循环创建3并生成整数”之类的指示被认为是可以接受的。再次感谢你！每个人都很乐于助人 ---编辑--- 在与一位老师交谈后，我成功地分离了形状的图形组件，并将它们放入移动中。Shapes知道如何提问并正确工作。我相信我仍然需要做一些调整，以绘制所有的移动，但我相信，现在一切都将更好地工作。我会让你看看现在的样子。再次感谢你帮助我走上正轨 项目1（或主要） 以下是形状：Java屏幕是空白的,java,swing,screen,Java,Swing,Screen,正如标题所说，我的java屏幕一直是空白的。我想让它显示类的形状和两个标签。如果你想看另一个关于画线和X的类，请告诉我。这就是我到目前为止所做的： ---编辑--- 既然你给了我建议，我已经取得了一些进展。我已经从Shapes的paint方法中删除了一段相当不错的代码，并将其移动到另一个方法或一个新类中以保持其干净。形状仍然是空白页，但事情看起来更好。另外，请不要粘贴答案代码。作为一名学生，我被指示不要复制代码。诸如“为循环创建3并生成整数”之类的指示被认为是可以接受的。再次感谢你！每个人都很乐
public class Shapes extends JPanel{
//put graphics inside of moves
//shapes will send an int for moves to interpret
private int answer;
int[] locationFill = new int[ 9 ];
Moves move;
private int turn = 0;
char x = 'x';
char o = 'o';
public Shapes(){
setBackground( Color.WHITE );
ask();
}
public void ask(){
String tryAgain =
String.format( "Already in use. Please choose again.");
while( getTurn() <= 9){
goesNext( getTurn() );
String input = JOptionPane.showInputDialog( "Choose your square" );
answer = Integer.parseInt( input );
//put these in pop up questions
switch( answer ){
case 1:
if( !isEmpty( answer ) ){
JOptionPane.showMessageDialog(null, tryAgain );
} else if( whatToDraw( answer ) == true ){
move = new Moves( answer, x );
locationFill[0] = 1;
turn++;
won();
} else {
move = new Moves( answer, o );
locationFill[0] = 2;
turn++;
won();
}
break;
case 2:
if( !isEmpty( answer ) ){
JOptionPane.showMessageDialog(null, tryAgain );
}else if( whatToDraw( answer ) == true ){
move = new Moves( answer, x );
locationFill[1] = 1;
turn++;
won();
}else{
move = new Moves( answer, o );
locationFill[1] = 2;
turn++;
won();
}
break;
case 3:
if( !isEmpty( answer ) ){
JOptionPane.showMessageDialog(null, tryAgain );
}else if( whatToDraw( answer ) == true ){
move = new Moves( answer, x );
locationFill[2] = 1;
turn++;
won();
}else{
move = new Moves( answer, o );
locationFill[2] = 2;
turn++;
won();
}
break;
case 4:
if( !isEmpty( answer ) ){
JOptionPane.showMessageDialog(null, tryAgain );
}else if( whatToDraw( answer ) == true ){
move = new Moves( answer, x );
locationFill[3] = 1;
turn++;
won();
}else{
move = new Moves( answer, o );
locationFill[3] = 2;
turn++;
won();
}
break;
case 5:
if( !isEmpty( answer ) ){
JOptionPane.showMessageDialog(null, tryAgain );
}else if( whatToDraw( answer ) == true ){
move = new Moves( answer, x );
locationFill[4] = 1;
turn++;
won();
}else{
move = new Moves( answer, o );
locationFill[4] = 2;
turn++;
won();
}
break;
case 6:
if( !isEmpty( answer ) ){
JOptionPane.showMessageDialog(null, tryAgain );
}else if( whatToDraw( answer ) == true ){
move = new Moves( answer, x );
locationFill[5] = 1;
turn++;
won();
}else{
move = new Moves( answer, o );
locationFill[5] = 2;
turn++;
won();
}
break;
case 7:
if( !isEmpty( answer ) ){
JOptionPane.showMessageDialog(null, tryAgain );
}else if( whatToDraw( answer ) == true ){
move = new Moves( answer, x );
locationFill[6] = 1;
turn++;
won();
}else{
move = new Moves( answer, o );
locationFill[6] = 2;
turn++;
won();
}
break;
case 8:
if( !isEmpty( answer ) ){
JOptionPane.showMessageDialog(null, tryAgain );
}else if( whatToDraw( answer ) == true ){
move = new Moves( answer, x );
locationFill[7] = 1;
turn++;
won();
}else{
move = new Moves( answer, o );
locationFill[7] = 2;
turn++;
won();
}
break;
case 9:
if( !isEmpty( answer ) ){
JOptionPane.showMessageDialog(null, tryAgain );
}else if( whatToDraw( answer ) == true ){
move = new Moves( answer, x );
locationFill[8] = 1;
turn++;
won();
}else{
move = new Moves( answer, o );
locationFill[8] = 2;
turn++;
won();
}
break;
default:
System.out.println("Somethings wrong");
break;
}//end switch
tie();
}//end while
}
public void goesNext( int turn ){
String player1 =
String.format( "Player1's Turn");
String player2 =
String.format( "Player2's Turn");
if( turn == 0 || turn % 2 == 0 ){
JOptionPane.showMessageDialog(null, player1);
}else{
JOptionPane.showMessageDialog(null, player2);
}
}
public boolean isEmpty( int i ){
boolean answer2 = true;
if( locationFill[ i - 1 ] == 0 ){
answer2 = true;
}else if( locationFill[ i - 1 ] == 1 || locationFill[ i - 1 ] == 2){
answer2 = false;
}
return answer2;
}//end isEmpty
public void won(){
String message =
String.format( "Three in a row!\nPlayer2 win!");
String message2 =
String.format( "Three in a row!\nPlayer1 win!");
if( ( locationFill[0] == 1 && locationFill[1] == 1 &&
locationFill[2] == 1 ) || ( locationFill[3] == 1 &&
locationFill[4] == 1 &&
locationFill[5] == 1) || ( locationFill[6] == 1 &&
locationFill[7] == 1 &&
locationFill[8] == 1) || ( locationFill[0] == 1 &&
locationFill[4] == 1 &&
locationFill[8] == 1) || ( locationFill[1] == 1 &&
locationFill[4] == 1 &&
locationFill[7] == 1) || ( locationFill[0] == 1 &&
locationFill[3] == 1 &&
locationFill[6] == 1) || ( locationFill[2] == 1 &&
locationFill[5] == 1 &&
locationFill[8] == 1) || ( locationFill[6] == 1 &&
locationFill[4] == 1 &&
locationFill[2] == 1) ){
JOptionPane.showMessageDialog(null, message);
System.exit(0);
}
if( ( locationFill[0] == 2 && locationFill[1] == 2 &&
locationFill[2] == 2 ) || ( locationFill[3] == 2 &&
locationFill[4] == 2 &&
locationFill[5] == 2) || ( locationFill[6] == 2 &&
locationFill[7] == 2 &&
locationFill[8] == 2) || ( locationFill[0] == 2 &&
locationFill[4] == 2 &&
locationFill[8] == 2) || ( locationFill[1] == 2 &&
locationFill[4] == 2 &&
locationFill[7] == 2) || ( locationFill[0] == 2 &&
locationFill[3] == 2 &&
locationFill[6] == 2) || ( locationFill[2] == 2 &&
locationFill[5] == 2 &&
locationFill[8] == 2) || ( locationFill[6] == 2 &&
locationFill[4] == 2 &&
locationFill[2] == 2) ){
JOptionPane.showMessageDialog(null, message2);
System.exit(0);
}
}//end won
public int getTurn(){
return turn;
}
public void tie(){
if( locationFill[0] != 0 && locationFill[1] != 0 &&
locationFill[2] != 0 && locationFill[3] != 0
&& locationFill[4] != 0 && locationFill[5] != 0
&& locationFill[6] != 0 && locationFill[7] != 0
&& locationFill[8] != 0 ){
String tie =
String.format( "It's a tie!");
String gameOver =
String.format( "Game Over" );
JOptionPane.showMessageDialog( null, tie );
JOptionPane.showMessageDialog( null, gameOver );
System.exit( 0 );
}
}//end tie
public boolean whatToDraw( int choice){
boolean a;
if( locationFill[ choice - 1 ] == 0 && turn % 2 == 0 ){
a = true;
}else{
a = false;
}
return a;
}
}
import java.awt.Color;
import java.awt.Graphics;
//this will be for the 4 lines needed for tick tac toe
public class Line {
private int x1,
y1,
x2,
y2;
private Color myColor;
//this is for grid
public Line( int x1, int y1, int x2, int y2, Color color ){
//set coordinants
this.x1 = x1;
this.y1 = y1;
this.x2 = x2;
this.y2 = y2;
myColor = color;
}//end constructor
public void draw( Graphics g ){
g.setColor( myColor );
g.drawLine( x1, y1, x2, y2 );
}//end draw
}//end class
我做了一些更改，以确保您不会出现黑屏问题
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class Project1 implements Runnable {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Project1());
}
@Override
public void run() {
// CREATE EVERYTHING
JFrame app = new JFrame();
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel(new BorderLayout());
// fsu title bar and footer
JLabel header = new JLabel("FSU");
JLabel footer = new JLabel("By Jared Scott");
// Shapes shape = new Shapes();
String message = String.format("Enter a number from"
+ " 1-9 to play tick tack toe.\n" + "The order of squares is\n"
+ "1 4 7\n2 5 8\n3 6 9"
+ "\nThe game ends when one player has three Xs or Os"
+ " in a row.\nPlayer1 starts first.");
JOptionPane.showMessageDialog(null, message);
// app.add( shape );
panel.add(header, BorderLayout.NORTH);
panel.add(footer, BorderLayout.SOUTH);
app.add(panel);
app.setSize(400, 700);
app.setVisible(true);
// app.validate();
// app.repaint();
}
}
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class Project1 implements Runnable {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Project1());
}
@Override
public void run() {
// CREATE EVERYTHING
JFrame app = new JFrame();
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel(new BorderLayout());
// fsu title bar and footer
JLabel header = new JLabel("FSU");
JLabel footer = new JLabel("By Jared Scott");
// Shapes shape = new Shapes();
String message = String.format("Enter a number from"
+ " 1-9 to play tick tack toe.\n" + "The order of squares is\n"
+ "1 4 7\n2 5 8\n3 6 9"
+ "\nThe game ends when one player has three Xs or Os"
+ " in a row.\nPlayer1 starts first.");
JOptionPane.showMessageDialog(null, message);
// app.add( shape );
panel.add(header, BorderLayout.NORTH);
panel.add(footer, BorderLayout.SOUTH);
app.add(panel);
app.setSize(400, 700);
app.setVisible(true);
// app.validate();
// app.repaint();
}
}
我运行了你的代码，注释了关于形状的行，在消息对话框之后，我得到了一个窗口，顶部是“FSU”，底部是“Jared Scott”。这是意料之中的。需要查看Shape类以进一步帮助。什么是类形状？你能显示它的代码吗？好的，我已经添加了它。因此，您不必感到困惑，它创建的线条要么成为Xs，要么成为tick-tac-toe的图形。在解释了switch语句中的答案后，它也会画出来。Line类在哪里？我很抱歉。我同时做了三件事。哈哈，就是这样。很抱歉我没有提供足够的细节。我正在尝试附加一个名为Shapes的类，它将绘制一个tick-tac-toe网格，接受用户输入，并在屏幕上绘制Xs和Os。你需要看形状课吗？不，但那是另一个问题。形状（更好的名称；游戏区域）应该扩展JPanel并覆盖paintComponent。实际移动应该保存在移动类中。列表将记录所有的移动。PlayArea将在每次调用paintComponent方法时绘制网格和移动。你可以将游戏区域添加到边框布局中心的主JPanel中。我将尝试将形状和绘制网格的星号结合起来。我将创建两个绘制组件，看看它的作用。
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class Project1 implements Runnable {
public static void main(String[] args) {
SwingUtilities.invokeLater(new Project1());
}
@Override
public void run() {
// CREATE EVERYTHING
JFrame app = new JFrame();
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel panel = new JPanel(new BorderLayout());
// fsu title bar and footer
JLabel header = new JLabel("FSU");
JLabel footer = new JLabel("By Jared Scott");
// Shapes shape = new Shapes();
String message = String.format("Enter a number from"
+ " 1-9 to play tick tack toe.\n" + "The order of squares is\n"
+ "1 4 7\n2 5 8\n3 6 9"
+ "\nThe game ends when one player has three Xs or Os"
+ " in a row.\nPlayer1 starts first.");
JOptionPane.showMessageDialog(null, message);
// app.add( shape );
panel.add(header, BorderLayout.NORTH);
panel.add(footer, BorderLayout.SOUTH);
app.add(panel);
app.setSize(400, 700);
app.setVisible(true);
// app.validate();
// app.repaint();
}
}