java 画矩形package testFrame;import java.awt.Color;import java.
来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/05/11 18:09:26
java 画矩形
package testFrame;
import java.awt.Color;
import java.awt.Component;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Rectangle;
public class FrameTest extends Frame {
/**
* @param args
*/
Rectangle rec;
Frame f;
public void paint(Graphics g)
{
super.paint(g);
g.setColor(Color.black);
g.fillRect(100,100,30,30);
try {
Thread.sleep(500);
}
catch (Exception ex) {
ex.printStackTrace();
}
repaint();
}
FrameTest()
{
f=new Frame("title");
f.setLocation(100,100);
f.setSize(600,400);
f.setVisible(true);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
FrameTest ft=new FrameTest();
}
}
为什么我的代码画不出矩形
我的一个朋友说他能画出~
package testFrame;
import java.awt.Color;
import java.awt.Component;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Rectangle;
public class FrameTest extends Frame {
/**
* @param args
*/
Rectangle rec;
Frame f;
public void paint(Graphics g)
{
super.paint(g);
g.setColor(Color.black);
g.fillRect(100,100,30,30);
try {
Thread.sleep(500);
}
catch (Exception ex) {
ex.printStackTrace();
}
repaint();
}
FrameTest()
{
f=new Frame("title");
f.setLocation(100,100);
f.setSize(600,400);
f.setVisible(true);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
FrameTest ft=new FrameTest();
}
}
为什么我的代码画不出矩形
我的一个朋友说他能画出~
你的代码有问题,你的类本身是frame,你也在类中绘制,但是你却没有显示,而是另外定义了一个frame来显示,你修改一下:
import java.awt.Color;
import java.awt.Component;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Rectangle;
public class FrameTest extends Frame {
/**
* @param args
*/
public void paint(Graphics g)
{
super.paint(g);
g.setColor(Color.black);
g.fillRect(100, 100, 30, 30);
try {
Thread.sleep(500);
}
catch (Exception ex) {
ex.printStackTrace();
}
//repaint();
}
FrameTest()
{
super("title");
setLocation(100,100);
setSize(600,400);
setVisible(true);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
FrameTest ft=new FrameTest();
}
}
这样应该没问题了.
import java.awt.Color;
import java.awt.Component;
import java.awt.Frame;
import java.awt.Graphics;
import java.awt.Rectangle;
public class FrameTest extends Frame {
/**
* @param args
*/
public void paint(Graphics g)
{
super.paint(g);
g.setColor(Color.black);
g.fillRect(100, 100, 30, 30);
try {
Thread.sleep(500);
}
catch (Exception ex) {
ex.printStackTrace();
}
//repaint();
}
FrameTest()
{
super("title");
setLocation(100,100);
setSize(600,400);
setVisible(true);
}
public static void main(String[] args) {
// TODO Auto-generated method stub
FrameTest ft=new FrameTest();
}
}
这样应该没问题了.
java 画矩形package testFrame;import java.awt.Color;import java.
import java.awt.*
import javax.swing.*; import java.awt.*; import java.awt.eve
import java.awt.*; import java.awt.event.*; import javax.swi
英语翻译import java.awt.*;import java.awt.event.*;import javax.s
求解释import java.awt.*; import java.awt.event.*; import javax.
The import java.awt is never used
import java.awt.*,我在MyEclipse里面写下后,下面提示 The import java.awt
import+java.awt.Graphics;+和++import+java.applet.Applet;这两条语句
import java.util.
import java.io.IOException;
import java.util.ArrayList;