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| import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class HomeWork extends MIDlet implements CommandListener {
Display d = Display.getDisplay(this);
FormattedFloatingDecimal.Form f = new Form("主窗口");
Command back = new Command("返回", Command.BACK, 1);
Command exit = new Command("退出", Command.EXIT, 1);
Command drs = new Command("绘制字符串", Command.OK, 1);
Command drc = new Command("画圆", Command.OK, 1);
Command drn = new Command("火柴棍拼字", Command.OK, 1);
public class CircleCanvas extends Canvas {
int pointX, pointY, len;
public void paint(Graphics g) {
g.setColor(255, 0, 0);
g.fillArc(pointX, pointY, len, len, 0, 360);
g.drawRect(pointX, pointY, len, len);
}
public void drawCircle(int x, int y, int r) {
pointX = x - r;
pointY = y - r;
len = 2 * r;
}
}
public class MyCanvas extends Canvas {
String printword = "";
int[] myenum = {
0, 0, Graphics.LEFT | Graphics.TOP,
getWidth() / 2, 0, Graphics.HCENTER | Graphics.TOP,
getWidth(), 0, Graphics.RIGHT | Graphics.TOP,
0, getHeight() / 2, Graphics.LEFT | Graphics.TOP, getWidth() / 2,
getHeight() / 2, Graphics.HCENTER | Graphics.TOP,
getWidth(), getHeight() / 2, Graphics.RIGHT | Graphics.TOP, 0,
getHeight(), Graphics.LEFT | Graphics.BOTTOM,
getWidth() / 2,
getHeight(), Graphics.HCENTER | Graphics.BOTTOM,
getWidth(), getHeight(), Graphics.RIGHT | Graphics.BOTTOM
};
int[] position = new int[3];
public void paint(Graphics g) {
g.setColor(255, 0, 0);
g.drawString(printword, position[0], position[1], position[2]);
}
public void DrawMyStrin(String s, int pos) {
printword = s;
position[0] = myenum[pos * 3 - 3];
position[1] = myenum[pos * 3 - 2];
position[2] = myenum[pos * 3 - 1];
}
}
//用火柴棍拼字
public class MatchNum extends Canvas {
int[][] lines =
{
{
100, 100, 120, 100
}, //0
{
100, 120, 120, 120
}, //1
{
100, 140, 120, 140
}, //2 //三个横
{
100, 100, 100, 120
}, //3
{
100, 120, 100, 140
}, //4//左边的两竖
{
120, 100, 120, 120
}, //5
{
120, 120, 120, 140
}
}; //6//右边的两竖
int[][] nums =
{
{
0, 2, 3, 4, 5, 6
}, //0
{
5, 6
}, //1
{
0, 1, 2, 5, 4
}, //2
{
0, 1, 2, 5, 6
}, //3
{
5, 6, 1, 3
}, //4
{
0, 1, 2, 3, 6
}, //5
{
3, 4, 0, 1, 2, 6
}, //6
{
0, 5, 6
}, //7
{
0, 1, 2, 3, 4, 5, 6
}, //8
{
0, 1, 3, 5, 6, 2
}, //9
};
int[] temp;
public void drawMyNum(int n) {
temp = nums[n];
}
public void paint(Graphics g) {
g.setColor(255, 0, 0);
int i = temp.length;
for (int j = 0; j <= i - 1; j++) {
int[] a = lines[temp[j]];
g.drawLine(a[0], a[1], a[2], a[3]);
}
}
}
public void startApp() {
f.addCommand(exit);
f.addCommand(drs);
f.addCommand(drc);
f.addCommand(drn);
f.setCommandListener(this);
d.setCurrent(f);
}
public void commandAction(Command c, Displayable dis) {
if (c == exit)
destroyApp(false);
else if (c == drs) {
MyCanvas m = new MyCanvas();
m.addCommand(back);
m.setCommandListener(this);
m.DrawMyStrin("字符串", new java.util.Random().nextInt(8) + 1);
d.setCurrent(m);
} else if (c == drc) {
CircleCanvas cc = new CircleCanvas();
cc.addCommand(back);
cc.setCommandListener(this);
cc.drawCircle(60, 60, 40);
d.setCurrent(cc);
} else if (c == drn) {
MatchNum mn = new MatchNum();
mn.addCommand(back);
mn.setCommandListener(this);
mn.drawMyNum(new java.util.Random().nextInt(9));
d.setCurrent(mn);
} else if (c == back) {
d.setCurrent(f);
}
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
notifyDestroyed();
}
}
|
