[英]Multi-Threading Can't Drawing Figures in Java
我想創建2個線程。 一個帶有移動矩形的線程,另一個帶有第二矩形的線程,第一個之后。 這是我想達到的圖片。
如何將我的類“ MovingRectangle”添加到線程? 或者我可以畫一個圖形(如矩形),以便在螺紋中移動? 我發現在Runnable的public void run()中,我無法在此處繪制(也許是我錯了……)...很抱歉,我幾天前就已經開始Java了,而我找不到答案。 這是主要的:
import javax.swing.JFrame;
public class Main extends JFrame
{
public Main()
{ }
public static void main (String[] args) throws InterruptedException {
JFrame f = new JFrame();
New_Thread x = new New_Thread();
f.add(x);
f.setTitle("Window");
f.setVisible(true);
f.setSize(800,800);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Thread t1 = new Thread (new New_Thread());
t1.start();
Thread t2 = new Thread (new New_Thread());
t2.start();
}
}
這是移動此矩形的代碼:
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Rectangle2D;
public class MovingRectangle extends square implements ActionListener {
Timer t = new Timer (50,this);
double x = 50;
double y= 700;
double velX= 10;
double velY=10;
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.setColor(Color.gray);
Rectangle2D rectangle = new Rectangle2D.Double(x,y,40,40);
g2.fill(rectangle);
t.start();
}
@Override
public void actionPerformed(ActionEvent e) {
y = y - velY;
if (y==90)
{
velY=0;
x=x+velX;
}
if (x==600)
{
velY=10;
velY=-velY;
}
if (x==600 && y == 700)
{
velY=0;
}
repaint();
}
}
這里是小方塊:
import javax.swing.*;
import java.awt.*;
import java.awt.geom.Rectangle2D;
public class square extends JPanel
{
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.setColor(Color.PINK);
Rectangle2D towar1 = new Rectangle2D.Double(20,500,30,30);
Rectangle2D towar2 = new Rectangle2D.Double(20,300,30,30);
Rectangle2D towar3 = new Rectangle2D.Double(20,100,30,30);
Rectangle2D towar4 = new Rectangle2D.Double(150,60,30,30);
Rectangle2D towar5 = new Rectangle2D.Double(350,60,30,30);
Rectangle2D towar6 = new Rectangle2D.Double(550,60,30,30);
Rectangle2D towar7 = new Rectangle2D.Double(640,500,30,30);
Rectangle2D towar8 = new Rectangle2D.Double(640,300,30,30);
Rectangle2D towar9 = new Rectangle2D.Double(640,100,30,30);
g2.fill(towar1);
g2.fill(towar2);
g2.fill(towar3);
g2.fill(towar4);
g2.fill(towar5);
g2.fill(towar6);
g2.fill(towar7);
g2.fill(towar8);
g2.fill(towar9);
}
}
在這里,新線程我想添加MovingRectangle類(或者只是想添加代碼來移動圖形),但是我不知道該怎么做。
public class New_Thread extends MovingRectangle implements Runnable {
@Override
public void run()
{
}
}
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