我有这个想要运行的GUI，当我尝试从类中创建一个Object时，我得到错误无法实例化类型GUI。那是什么意思，我该如何解决？
主类中的代码
public static void main(String[] args){
//Classes
GUI go = new GUI();
//Running Class Methods
//JFrame
//JFrame frame = new JFrame("Yatsy");
go.setVisible(true);
go.setVisible(true);
//go.setLocation((dim.width - width) / 2, (dim.height - height) / 2);
go.setSize(width, height);
System.out.println(width + " " + height);
//draw paint = new draw();
//go.add(paint);
}
代码
public GUI(){
super();
panel = new JPanel();
roll = new JButton("Roll");
nextPlayer = new JButton("Next Player");
bDice1 = new JButton("dice");
quit = new JButton("Quit");
use = new JButton("Use");
roll.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
if(turn == true){
rollResult1 = roll1();
rollResult2 = roll2();
rollResult3 = roll3();
rollResult4 = roll4();
rollResult5 = roll5();
sRollResult1 = Integer.toString(rollResult1);
sRollResult2 = Integer.toString(rollResult2);
sRollResult3 = Integer.toString(rollResult3);
sRollResult4 = Integer.toString(rollResult4);
sRollResult5 = Integer.toString(rollResult5);
rolls++;
start = false;
repaint();
System.out.println( rollResult1 + " " + rollResult2 + " " + rollResult3 + " " + rollResult4 + " " + rollResult5);
//System.out.println( rollAI );
}
if(rolls == 3){
turn = false;
System.out.println("Out of rolls");
}
}
});
nextPlayer.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
if(rolls > 0){
rolls = 0;
System.out.println("Next player");
turn = true;
repaint();
start = true;
}
}
});
quit.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
System.exit(0);
}
});
add(panel, BorderLayout.CENTER);
panel.setBackground(Color.BLUE);
add(quit, BorderLayout.SOUTH);
add(roll, BorderLayout.NORTH);
add(nextPlayer, BorderLayout.EAST);
Handlerclass handler = new Handlerclass();
panel.addMouseListener(handler);
}
所以我想知道为什么会出错？
我正在使用java 1.7！
对于那些想知道这是完整代码!!!!
package Christofer;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public abstract class GUI extends JFrame implements MouseListener{
private static final long serialVersionUID = 1L;
int dice1, dice2, dice3, dice4, dice5;
private JButton roll;
private JButton nextPlayer;
private JButton bDice1;
private JButton quit;
private JButton use;
private JPanel panel;
public int rolls = 0;
public boolean turn = true;
public boolean start = true;
boolean saved1 = false, saved2 = false, saved3 = false, saved4 = false, saved5 = false;
int rollResult1;
int rollResult2;
int rollResult3;
int rollResult4;
int rollResult5;
String sRollResult1, sRollResult2, sRollResult3, sRollResult4, sRollResult5;
public GUI(){
super();
panel = new JPanel();
roll = new JButton("Roll");
nextPlayer = new JButton("Next Player");
bDice1 = new JButton("dice");
quit = new JButton("Quit");
use = new JButton("Use");
roll.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
if(turn == true){
rollResult1 = roll1();
rollResult2 = roll2();
rollResult3 = roll3();
rollResult4 = roll4();
rollResult5 = roll5();
sRollResult1 = Integer.toString(rollResult1);
sRollResult2 = Integer.toString(rollResult2);
sRollResult3 = Integer.toString(rollResult3);
sRollResult4 = Integer.toString(rollResult4);
sRollResult5 = Integer.toString(rollResult5);
rolls++;
start = false;
repaint();
System.out.println( rollResult1 + " " + rollResult2 + " " + rollResult3 + " " + rollResult4 + " " + rollResult5);
//System.out.println( rollAI );
}
if(rolls == 3){
turn = false;
System.out.println("Out of rolls");
}
}
});
nextPlayer.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
if(rolls > 0){
rolls = 0;
System.out.println("Next player");
turn = true;
repaint();
start = true;
}
}
});
quit.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent event){
System.exit(0);
}
});
add(panel, BorderLayout.CENTER);
panel.setBackground(Color.BLUE);
add(quit, BorderLayout.SOUTH);
add(roll, BorderLayout.NORTH);
add(nextPlayer, BorderLayout.EAST);
Handlerclass handler = new Handlerclass();
panel.addMouseListener(handler);
}
public void paint(Graphics g){
Graphics2D g2d = (Graphics2D)g;
this.setBackground(Color.BLUE);
g2d.setColor(Color.WHITE);
g2d.fillRoundRect(getWidth() / 2 - 75, getHeight() / 2 - 50, 30, 30, 5, 5); //Dice 1
g2d.fillRoundRect(getWidth() / 2 - 40, getHeight() / 2 - 50, 30, 30, 5, 5); //Dice 2
g2d.fillRoundRect(getWidth() / 2 - 5, getHeight() / 2 - 50, 30, 30, 5, 5); //Dice 3
g2d.fillRoundRect(getWidth() / 2 + 30, getHeight() / 2 - 50, 30, 30, 5, 5); //Dice 4
g2d.fillRoundRect(getWidth() / 2 + 65, getHeight() / 2 - 50, 30, 30, 5, 5); //Dice 5
//Score Board
g2d.fillRect(30, 70, 370, getHeight() - 125);
g2d.setColor(Color.BLACK);
g2d.drawLine(150, 70, 150, getHeight() - 30);
g2d.drawLine(30, 70, 400, 70);
g2d.drawString("Ones", 35, 85);
g2d.drawLine(30, 90, 400, 90);
g2d.drawString("Twos", 35, 105);
g2d.drawLine(30, 110, 400, 110);
g2d.drawString("Threes", 35, 125);
g2d.drawLine(30, 130, 400, 130);
g2d.drawString("Fours", 35, 145);
g2d.drawLine(30, 150, 400, 150);
g2d.drawString("Fives", 35, 165);
g2d.drawLine(30, 170, 400, 170);
g2d.drawString("Sixes", 35, 185);
g2d.drawLine(30, 190, 400, 190);
if(start == false){
g.setColor(Color.BLACK);
Font font = new Font("Arial", Font.PLAIN, 25);
g2d.setFont(font);
g2d.drawString( sRollResult1 + " " + sRollResult2 + " " + sRollResult3 + " " + sRollResult4 + " " + sRollResult5, getWidth() / 2 - 70 , getHeight() / 2 - 25 );
if(turn == false){
g2d.setColor(Color.RED);
g2d.drawString("Out Of Rolls", getWidth() / 2 - 70, getHeight() / 2 - 75);
}
}
}
public int roll1(){
if (saved1 == false){
dice1 = (int )(Math.random() * 6 + 1);
}
return dice1;
}
public int roll2(){
if (saved2 == false){
dice2 = (int )(Math.random() * 6 + 1);
}
return dice2;
}
public int roll3(){
if (saved3 == false){
dice3 = (int )(Math.random() * 6 + 1);
}
return dice3;
}
public int roll4(){
if (saved4 == false){
dice4 = (int )(Math.random() * 6 + 1);
}
return dice4;
}
public int roll5(){
if (saved5 == false){
dice5 = (int )(Math.random() * 6 + 1);
}
return dice5;
}
private class Handlerclass implements MouseListener{
@Override
public void mouseClicked(MouseEvent e) {
}
@Override
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
mx = e.getX();
my = e.getY();
System.out.println("X: " + mx + " Y: " + my);
if(mx < getWidth() / 2 - 75 && mx > getWidth() / 2 - 45 && my < getHeight() / 2 - 50 && my > getHeight() / 2 - 20){
System.out.println("saved1 = true");
}
}
public void mouseReleased(MouseEvent e) {
}
}
}
我知道我有一些清理工作
答案 0 :(得分：7)
public abstract class GUI是你的问题。你无法实例化抽象类。
http://docs.oracle.com/javase/tutorial/java/IandI/abstract.html
你可以创建一个子类并实例化它。