Java 使用绘图方法时出现嵌套循环,无法正确设置

Java 使用绘图方法时出现嵌套循环,无法正确设置,java,swing,paint,Java,Swing,Paint,我需要帮助了解如何使用java中的draw方法在嵌套for循环中绘制棋盘格/棉被状图案。我的实验作业如下。 您必须创建一个QuitPattern类并声明该类的两个对象。此类的构造函数将接受一个参数,该参数设置对象的特征(如颜色),在绘制缝合线时替换这些对象。确保你的被子至少有5块宽,7块下。QuiltPattern类应该包括一个名为Draw()的方法,该方法在屏幕上的特定位置绘制图案。必须使用嵌套循环来绘制棉被。 我几乎写了所有东西,但我很难画出像羽毛笔/棋盘一样的对象。我似乎无法使它对齐,到目

我需要帮助了解如何使用java中的draw方法在嵌套for循环中绘制棋盘格/棉被状图案。我的实验作业如下。 您必须创建一个QuitPattern类并声明该类的两个对象。此类的构造函数将接受一个参数,该参数设置对象的特征(如颜色),在绘制缝合线时替换这些对象。确保你的被子至少有5块宽,7块下。QuiltPattern类应该包括一个名为Draw()的方法,该方法在屏幕上的特定位置绘制图案。必须使用嵌套循环来绘制棉被。 我几乎写了所有东西,但我很难画出像羽毛笔/棋盘一样的对象。我似乎无法使它对齐,到目前为止,我只有两行是偏移的。如果您能提供任何帮助或建议,使其在嵌套循环中工作,我们将不胜感激。我一直在努力寻找类似的东西,但运气不太好。我做错了什么

这是我的被单:

import javax.swing.*;
import java.awt.*;

public class QuiltPanel extends JPanel
{
    int x = 0, y = 0, count = 0;

private Quilt squareOne, squareTwo;

public QuiltPanel()
{
    squareOne = new Quilt(25, Color.blue, x+50, y);
    squareTwo = new Quilt(25, Color.green, x+25, y);

    setPreferredSize(new Dimension(750, 500));
    setBackground(Color.black);

}
public void paintComponent(Graphics page)
    {
        super.paintComponent(page);
        for ( count = 0; count <= 10; count = count+1)
        {   if ( count % 2 == 0)
            {   if ( count <= 5)
                {   squareOne.draw(page);
                    squareOne = new Quilt(25, Color.blue, x, y);

                }
                else
                {   squareOne.draw(page);
                    squareOne = new Quilt(25, Color.blue, x, y+25);

                }

            }
            else
            {   if ( count <= 5)
                {   squareTwo.draw(page);
                    squareTwo = new Quilt(25, Color.green, x, y);

                }
                else
                {   squareTwo.draw(page);
                    squareTwo = new Quilt(25, Color.green, x, y+25);

                }

            }
            x=x+25;
        }
   }
}
如果您需要我的绗缝图案(JFrame):


您的“棉被”类应为“棉被”类。所以我只是将代码从QuiltPattern复制粘贴到QuiltPattern,正如程序中所说的那样,QuiltPattern将进行绘图,它将有两个具有不同绘图属性的对象

最好将主类分开。我创建了一个新类QuiltMain来初始化框架和面板。(这都是你的代码)

更改了QuiltPattern的构造函数(以前的QuiltPattern)以接受2个参数color和size作为正方形的位置,并在逻辑上传递给draw()方法本身

最后循环创建棋盘格图案。通常有3种选择

备选方案1

int initX = getWidth() / 2 - (columnCount * squareSide) / 2;
int initY = getHeight() / 2 - (rowCount * squareSide) / 2;
int squareCount = rowCount * columnCount;

for(int i = 0; i < squareCount; i++) {
    int rowI = squareCount / rowCount;
    int colJ = squareCount % columnCount;

    //draw at (initX + colJ * squareSide, initY + colI * squareSide)
}
绗缝机

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class QuiltPattern {
    private int height, width, x, y;
    private Color color;

    public QuiltPattern(int size, Color newColor) {
        width = size;
        height = size;
        color = newColor;
    }

    public void draw(Graphics page, int x, int y) {
        page.setColor(color);
        page.fillRect(x, y, width, height);
    }

    public void setHeight(int size) {
        height = size;
    }

    public void setWidth(int size) {
        width = size;
    }

    public void setColor(Color newColor) {
        color = newColor;
    }

    public void setX(int upperX) {
        x = upperX;
    }

    public void setY(int upperY) {
        y = upperY;
    }

    public int getHeight() {
        return height;
    }

    public int getWidth() {
        return width;
    }

    public Color getColor() {
        return color;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }
}
棉被

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;

import javax.swing.JPanel;

class QuiltPanel extends JPanel {
    int x = 0, y = 0;
    int rowCount = 7;
    int columnCount = 5;

    private QuiltPattern squareOne, squareTwo;

    public QuiltPanel() {
        squareOne = new QuiltPattern(25, Color.blue);
        squareTwo = new QuiltPattern(25, Color.green);

        setPreferredSize(new Dimension(750, 500));
        setBackground(Color.black);

    }

    public void paintComponent(Graphics page) {
        super.paintComponent(page);
        int count = 0;
        int squareSide = squareOne.getWidth();
        boolean firstOne = true;

        int quiltWidth = columnCount * squareSide;
        int quiltHeight = rowCount * squareSide;

        int initX = (getWidth() - quiltWidth) / 2;
        int initY = (getHeight() - quiltHeight) / 2;

            for(int colJ = 0; colJ < columnCount; colJ++) {
                for(int rowI = 0; rowI < rowCount; rowI++) {
                    int x = colJ * squareSide + initX;
                    int y =  rowI * squareSide + initY;
                    if(firstOne) {
                        squareOne.draw(page, x, y);
                    } else {
                        squareTwo.draw(page, x, y);
                    }
                    firstOne = !firstOne;
                }
            }
    }
}
导入java.awt.Color;
导入java.awt.Dimension;
导入java.awt.Graphics;
导入javax.swing.JPanel;
类QuiltPanel扩展了JPanel{
int x=0,y=0;
int rowCount=7;
int columnCount=5;
私人绗缝机平方一、平方二;
公共绗缝布(){
squareOne=新绗缝图案(25,颜色为蓝色);
squareTwo=新绗缝图案(25,颜色为绿色);
setPreferredSize(新尺寸(750500));
挫折背景(颜色:黑色);
}
公共组件(图形页){
super.paintComponent(第页);
整数计数=0;
int squareSide=squareOne.getWidth();
布尔值firstOne=true;
int quiltWidth=列计数*平方边;
int quiltHeight=行数*平方边;
int initX=(getWidth()-quiltWidth)/2;
int initY=(getHeight()-quiltHeight)/2;
for(int colJ=0;colJ
是否必须使用正方形绘制棋盘?你不能用直线吗,那应该是直截了当的。还有,“交替那些物体”是什么意思?假设对draw方法的一次调用将绘制整个棉被,下一次alternate对象将只是覆盖它。它只是说它需要至少5个块宽和7个向下交替不同的设计。它需要看起来像一床被子,但棋盘已经足够接近我想要实现的目标了。我只需要弄清楚如何在循环中逐列重复它们。@11thdimension此项目基于Java软件解决方案第8版中的一个项目。书中的项目要求我们编写一个程序,绘制一条被子,其中一个简单的图案在正方形网格中重复。然后我们必须修改它,使其具有交替的颜色或任何我们想要的特征。所以最终的结果和被子相似或者可以识别。我想我已经知道了,很快就会发布一些东西。谢谢!我肯定有一点不对劲。非常感谢你的帮助。
int centerX = getWidth() / 2;
int centerY = getHeight() / 2;

for(int colJ = -rowCount/2; colJ < rowCount/2; colJ++) { //condition will include <= when rowCount is odd
    for(int rowI = -columnCount/2; rowI < columnCount/2; rowI++) {//condition will include <= when columnCount is odd

    //draw at (centerX + colJ * squareSide, centerY + colI * squareSide)
}
int initX = getWidth() / 2 - (columnCount * squareSide) / 2;
int initY = getHeight() / 2 - (rowCount * squareSide) / 2;

for(int colJ = 0; colJ < rowCount; colJ++) {
    for(int rowI = 0; rowI < columnCount; rowI++) {

    //draw at (initX + colJ * squareSide, initY + colI * squareSide)
}
import javax.swing.JFrame;


public class QuiltMain {
    public static void main(String[] args) {
        JFrame frame = new JFrame("QuiltPattern");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.getContentPane().add(new QuiltPanel());
        frame.getContentPane().add(new QuiltPanel());

        frame.pack();
        frame.setVisible(true);
    }
}
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class QuiltPattern {
    private int height, width, x, y;
    private Color color;

    public QuiltPattern(int size, Color newColor) {
        width = size;
        height = size;
        color = newColor;
    }

    public void draw(Graphics page, int x, int y) {
        page.setColor(color);
        page.fillRect(x, y, width, height);
    }

    public void setHeight(int size) {
        height = size;
    }

    public void setWidth(int size) {
        width = size;
    }

    public void setColor(Color newColor) {
        color = newColor;
    }

    public void setX(int upperX) {
        x = upperX;
    }

    public void setY(int upperY) {
        y = upperY;
    }

    public int getHeight() {
        return height;
    }

    public int getWidth() {
        return width;
    }

    public Color getColor() {
        return color;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }
}
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;

import javax.swing.JPanel;

class QuiltPanel extends JPanel {
    int x = 0, y = 0;
    int rowCount = 7;
    int columnCount = 5;

    private QuiltPattern squareOne, squareTwo;

    public QuiltPanel() {
        squareOne = new QuiltPattern(25, Color.blue);
        squareTwo = new QuiltPattern(25, Color.green);

        setPreferredSize(new Dimension(750, 500));
        setBackground(Color.black);

    }

    public void paintComponent(Graphics page) {
        super.paintComponent(page);
        int count = 0;
        int squareSide = squareOne.getWidth();
        boolean firstOne = true;

        int quiltWidth = columnCount * squareSide;
        int quiltHeight = rowCount * squareSide;

        int initX = (getWidth() - quiltWidth) / 2;
        int initY = (getHeight() - quiltHeight) / 2;

            for(int colJ = 0; colJ < columnCount; colJ++) {
                for(int rowI = 0; rowI < rowCount; rowI++) {
                    int x = colJ * squareSide + initX;
                    int y =  rowI * squareSide + initY;
                    if(firstOne) {
                        squareOne.draw(page, x, y);
                    } else {
                        squareTwo.draw(page, x, y);
                    }
                    firstOne = !firstOne;
                }
            }
    }
}