您好,我在尝试绘制多边形时遇到了麻烦。首先,当我尝试使用addPoint(int x, int y)
方法绘制多边形并逐个给出坐标时,没有问题,可以完美地绘制多边形。但是,如果我将坐标作为数组(x坐标和y坐标的整数数组)给出错误。这是工作的代码,你可以看到,ArrayIndexOutOfBoundsException在绘制多边形时出错
@Override
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
Polygon poly = new Polygon();
poly.addPoint(150, 150);
poly.addPoint(250, 100);
poly.addPoint(325, 125);
poly.addPoint(375, 225);
poly.addPoint(450, 250);
poly.addPoint(275, 375);
poly.addPoint(100, 300);
g2.drawPolygon(poly);
}
但如果我使用xpoints
和ypoints
阵列(其在图形类中定义的多边形),它不正常工作。
@Override
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D) g;
Polygon poly = new Polygon();
poly.xpoints[0]=150;
poly.xpoints[1]=250;
poly.xpoints[2]=325;
poly.xpoints[3]=375;
poly.xpoints[4]=450;
poly.xpoints[5]=275;
poly.xpoints[6]=100;
poly.ypoints[0]=150;
poly.ypoints[1]=100;
poly.ypoints[2]=125;
poly.ypoints[3]=225;
poly.ypoints[4]=250;
poly.ypoints[5]=375;
poly.ypoints[6]=300;
g2.drawPolygon(poly.xpoints, poly.ypoints, 7);
}
我会很感激,如果你能帮助和感谢。
xpoints和ypoints的数组大小是多少? – PermGenError 2013-03-01 21:44:16
我认为它应该是7因为每个数组有7个整数元素? – quartaela 2013-03-01 21:45:27
尝试'poly.xpoints = new int [7]; poly.ypoints = new int [7];' – gefei 2013-03-01 21:46:10