Java 如何让这个JButton重新绘制模具图形？

这是我的主要类，我想实现鼠标按钮。我在actionPerformed区域的代码中遇到了问题，无法让模具获得一个新值，并在单击按钮的相同位置重新绘制自身

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这是我创建模具的模具类

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这是我的roll类，它获取骰子的值

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我认为您需要更改Die类，并为其提供roll（）方法，其中它调用Roe的die1（）方法，并将number字段设置为该值，然后调用repaint。在半伪码中：

public void roll() {
   Use Roll to get a new int value
   set number field to this new int value
   call repaint on itself
}

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然后在ActionListener的

actionPerformed（…）

中，对显示的Die对象调用此新方法。

我在RollListener的

actionPerformed（…）

方法中没有看到任何代码。您可能想先尝试一些东西，向我们展示您尝试过的东西，然后让我们知道它是否起作用，它做错了什么。1）要更快获得更好的帮助，请发布一个。2） 是这个吗？如果是这样的话，把它贴上这样的标签是有好处的。@Hov“既然你没有回应……”（怀旧）我记得在usenet上，有几天我会责骂人们质疑回答、质疑问题等，直到48小时过去。日子一天天过去……）抱歉，我正在吃东西，我已经尝试过的代码是Die die1=新的Die（0,0,50,50），然后是Die.repaint（）；出于某种原因，我认为它创建了模具，但它只使它变大了一个像素，因为在我点击按钮后，它在模具旁边显示了一个红色的小像素button@Andrew：点对了。根据新信息提供的答案。否决票被取消了，成功了！非常感谢你为什么这么做有效，而当我试着给点名课打电话时却没有用？@Alex:不客气。Roll类只创建一个随机数，不多不少。你需要更新Die对象的number字段，我怀疑你没有这样做。是的，这是有道理的，我知道我没有在原来的Roll类中重新绘制，但我现在得到了，谢谢again@Alex：您在尝试中还创建了一个新的模具对象，是的，您将在创建该对象时更改该对象上的数字字段，但它是一个全新的对象，与GUI中显示的模具对象无关。该部分帮助我更新了模具，但它不会让我在另一个模具旁边创建第二个模具，它所做的只是更换第一个模具。我是否创建了类似于绘制两个骰子的数组？我更新了新代码

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.geom.Ellipse2D;

import javax.swing.JComponent;


public class Die extends JComponent
{
private static final long serialVersionUID = 1L;

//Variable for creating the die background
private Rectangle dieBorder;
//private int number = Roll.die1();
//Variable for creating the number of circles on die
private Ellipse2D numCircle;
private Ellipse2D numCircle2;
private Ellipse2D numCircle3;
private Ellipse2D numCircle4;
private Ellipse2D numCircle5;
private Ellipse2D numCircle6;
private Ellipse2D numCircle7;

      private int width = 50;
      private int height = 50;

/*
 * This constructs the DieComponent
 * with @param number. 
 */
public Die(int xPos, int yPos, int number1)
{
    number = number1;
    dieBorder = new Rectangle(xPos, yPos, width, height);

    numCircle = new Ellipse2D.Double(locationX(xPos, 2, 0), locationY(yPos, 2, 0), 8, 8);
    numCircle2 = new Ellipse2D.Double(locationX(xPos, 1, -7), locationY(yPos, 1, -7), 8, 8);
    numCircle3 = new Ellipse2D.Double(locationX(xPos, 1, -43), locationY(yPos, 1, -43), 8, 8);
    numCircle4 = new Ellipse2D.Double(locationX(xPos, 1, -7), locationY(yPos, 1, -43), 8, 8);
    numCircle5 = new Ellipse2D.Double(locationX(xPos, 1, -43), locationY(yPos, 1, -7), 8, 8);
    numCircle7 = new Ellipse2D.Double(locationX(xPos, 2, -18), locationY(yPos, 2, 0), 8, 8);
    numCircle6 = new Ellipse2D.Double(locationX(xPos, 2, 18), locationY(yPos, 2, 0), 8, 8);
}

/*
 * This will create the die graphics for 
 * the game. With @param g.
 */
public void paintComponent(Graphics g)
{
    Graphics2D g2 = (Graphics2D) g;
    super.paintComponent(g2);

    //Sets color of field
    g2.setColor(Color.RED);
    //Draws the die background
    g2.draw(dieBorder);
    //Fills in the background
    g2.fill(dieBorder);

    if(number == 1)
    {
    //Sets color to draw the circle with
    g2.setColor(Color.WHITE);
    //Draws the circle
    g2.draw(numCircle);
    //Fills in the circle
    g2.fill(numCircle);
    }

    if(number == 2)
    {
        g2.setColor(Color.WHITE);
        g2.draw(numCircle2);
        g2.draw(numCircle3);
        g2.fill(numCircle3);
        g2.fill(numCircle2);
    }

    if(number == 3)
    {
        g2.setColor(Color.WHITE);
        g2.draw(numCircle2);
        g2.draw(numCircle3);
        g2.draw(numCircle);
        g2.fill(numCircle3);
        g2.fill(numCircle2);
        g2.fill(numCircle);
    }

    if(number == 4)
    {
        g2.setColor(Color.WHITE);
        g2.draw(numCircle2);
        g2.draw(numCircle3);
        g2.draw(numCircle4);
        g2.draw(numCircle5);
        g2.fill(numCircle3);
        g2.fill(numCircle2);
        g2.fill(numCircle4);
        g2.fill(numCircle5);

    }

    if(number == 5)
    {
        g2.setColor(Color.WHITE);
        g2.draw(numCircle);
        g2.draw(numCircle2);
        g2.draw(numCircle3);
        g2.draw(numCircle4);
        g2.draw(numCircle5);
        g2.fill(numCircle3);
        g2.fill(numCircle2);
        g2.fill(numCircle4);
        g2.fill(numCircle);
        g2.fill(numCircle5);
    }

    if(number == 6)
    {
        g2.setColor(Color.WHITE);
        g2.draw(numCircle2);
        g2.draw(numCircle3);
        g2.draw(numCircle4);
        g2.draw(numCircle5);
        g2.draw(numCircle6);
        g2.draw(numCircle7);
        g2.fill(numCircle3);
        g2.fill(numCircle2);
        g2.fill(numCircle4);
        g2.fill(numCircle5);
        g2.fill(numCircle6);
        g2.fill(numCircle7);
    }
}

public static int locationX(int xPos, int spot, int move)
{
    int xPosition = (xPos + 50 / spot) - 4 + move;

    //Returns the x position of where the circle should be
    return xPosition;
}

/*
 * This method will get the height of 
 * the border of the die and formulate where
 * to place the y position of the numCircle based
 * on value of die and uses spot to determine where
 * to draw circle.
 */
public static int locationY(int yPos, int spot, int move)
{
    //Formula to calculate position of circle
    int yPosition = (yPos + 50 / spot) - 4 + move;

    //Returns the y position of where circle should be
    return yPosition;
}

      public void roll()
      {
         number = Roll.die1();
         repaint();
      }
      //This is where i think im messing up cuz it just replaces the first die
      public void roll2()
      {
        number = Roll.die2();
        repaint();
      }
}

import java.util.Random;

/*
* This class sets up methods that 
* retrieve what random number is to
* be displayed on the die for each 
* one.
*/
public class Roll 
{
//Sets up var for die1
private static int die1;
//Sets up var for die2
private static int die2;

/*
 * This method creates the die1
 * and it assigns a random number
 * between 1-6 to the die.
 */
public static int die1()
{
    //Create random number generator
    Random gen = new Random();

    //Uses generator to assign number
    die1 = gen.nextInt(6) + 1;

    //Returns die1 value
    return die1;
}


/*
 * This method creates die2 and 
 * assigns a random number between
 * 1-6 to the die.
 */
public static int die2()
{
    //Create random number generator
    Random gen2 = new Random();

    //Uses generator to assign number
    die2 = gen2.nextInt(6) + 1;

    //Returns die2 value
    return die2;
}

/*
 * This method gets the value of both
 * die1 and die2 and adds them together.
 * This will allow the game to decide
 * what bets win and what bets lose.
 */
public static int total()
{
    //Gets die1 and die2 and adds them
    int total = die1 + die2;
    //Returns total value
    return total;
}
}

public void roll() {
   Use Roll to get a new int value
   set number field to this new int value
   call repaint on itself
}