安好如初

回答时间：2019-12-05

向TA提问

public interface IDrawStar {

void setColor(Color c);

void moveStar(int x,int y);

void draw(Graphics g);

}

public class Star implements IDrawStar{

double star_x[]= new double[5];

double star_y[]= new double[5]; //5个点

Color myClor = Color.orange;

GeneralPath path = new GeneralPath(GeneralPath.WIND_EVEN_ODD);

int move_x =0; //位移量

int move_y =0;

public Star(){

//确定五角星的点

for(int i=0; i<5;i++){

star_x[i] = Math.cos((i*2)*Math.PI/5.0)*100;

star_y[i] = Math.sin((i*2)*Math.PI/5.0)*100;

}

//设定图形五角星

path.moveTo(star_x[2], star_y[2]);

path.lineTo(star_x[0], star_y[0]);

path.lineTo(star_x[3], star_y[3]);

path.lineTo(star_x[1], star_y[1]);

path.lineTo(star_x[4], star_y[4]);

path.closePath();

path.setWindingRule(GeneralPath.WIND_NON_ZERO); //设定填充规则，非零和零，填1或0也行

}

@Override

public void setColor(Color c) {

myClor = c;

}

@Override

public void moveStar(int x, int y) {

move_x =x;

move_y =y;

}

@Override

public void draw(Graphics g) {

Graphics2D g2d = (Graphics2D) g;

g2d.setColor(myClor);

g2d.translate(move_x, move_y); //平移

g2d.fill(path); //填充

}

}

public class myJF extends JFrame{

Star star ;

public myJF(){

star = new Star();

this.init();

this.repaint();

}

private void init(){

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

this.setSize(800, 600);

this.setVisible(true);

}

@Override

public void paint(Graphics g){

super.paint(g);

star.setColor(Color.GREEN);

star.moveStar(120, 120);

star.draw(g);

star.setColor(Color.orange);

star.moveStar(120, 60);

star.draw(g);

star.setColor(Color.red);

star.moveStar(120, -60);

star.draw(g);

}

public static void main(String args[]){

new myJF();

}

}

netBeans7下运行正常 俺没eclipse的

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