题目大意是:在JAVA小程序窗口中显示“java程序设计”,按下键盘上的箭头建,字符串相应移动
书翻了,也GOOGLE了,我实在不知道该如何使用paint重画实现移动效果,请指点,如果我实在写得太遭,请编出一个新程序来帮助解惑,感谢各位
因为是新手,请大家说详细些,再次感谢我的程序:
//第一个类,绘图类
import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Color;
public class Tutu{ public int x,y; Tutu(int a,int b){
x=a;
y=b;
} public void paint(Graphics g){
g.setColor(Color.green);
g.drawString("java程序设计",x,y);
}
public void repaint(Graphics r){
r.setColor(Color.green);
g.drawString("java程序设计",x,y);
}
} //第二个类,实现APPLET
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*; public class T312 extends Applet{ Tutu tu=new Tutu(300,200);
public void init(){
addKeyListener(new type());
} public class type extends KeyAdapter{
public void keyTyped(KeyEvent e){ if(e.getKeyCode()==KeyEvent.VK_UP)
{
tu.y+=20;
}
else if(e.getKeyCode()==KeyEvent.VK_DOWN)
{
tu.y-=20;
}
else if (e.getKeyCode()==KeyEvent.VK_LEFT)
{
tu.x-=20;
}
else if(e.getKeyCode()==KeyEvent.VK_RIGHT)
{
tu.x+=20;
} }
}
}
书翻了,也GOOGLE了,我实在不知道该如何使用paint重画实现移动效果,请指点,如果我实在写得太遭,请编出一个新程序来帮助解惑,感谢各位
因为是新手,请大家说详细些,再次感谢我的程序:
//第一个类,绘图类
import java.applet.Applet;
import java.awt.Graphics;
import java.awt.Color;
public class Tutu{ public int x,y; Tutu(int a,int b){
x=a;
y=b;
} public void paint(Graphics g){
g.setColor(Color.green);
g.drawString("java程序设计",x,y);
}
public void repaint(Graphics r){
r.setColor(Color.green);
g.drawString("java程序设计",x,y);
}
} //第二个类,实现APPLET
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*; public class T312 extends Applet{ Tutu tu=new Tutu(300,200);
public void init(){
addKeyListener(new type());
} public class type extends KeyAdapter{
public void keyTyped(KeyEvent e){ if(e.getKeyCode()==KeyEvent.VK_UP)
{
tu.y+=20;
}
else if(e.getKeyCode()==KeyEvent.VK_DOWN)
{
tu.y-=20;
}
else if (e.getKeyCode()==KeyEvent.VK_LEFT)
{
tu.x-=20;
}
else if(e.getKeyCode()==KeyEvent.VK_RIGHT)
{
tu.x+=20;
} }
}
}
import java.awt.*;public class TempApplet extends Applet {
int x, y;
String str;
int v = 10;
public TempApplet() {
x = 100;
str = "测试";
y = 100;
}
public void init() {
this.resize(300, 300);
}
public void paint(Graphics g) {
g.drawString(str, x, y);
}
public boolean keyDown(Event e, int keycode) {
if (keycode == 1004)
y -= v;
else if (keycode == 1005)
y += v;
else if (keycode == 1006)
x -= v;
else if (keycode == 1007)
x += v;
repaint();
return true;
}
}