下列Applet实现了用不同颜色打印出大写字母A~J。请选择正确的语句填入横线处。 import java.applet.*; import java.awt.*; public class ex29 extends Applet { public void paint (Graphics gg) { int r = 0, g = 0, b = 0, j = 20; for(char ch = ’A’; ch <= ’J’; ch ++) { gg.drawString("" + ch, j, 30); if(ch - ’A’ % 3 == 0) r += 50; if(ch - ’B’ % 3 == 0) g += 30; if(ch - ’C’ % 3 == 0) b += 20; j +=17; } } }
A. setColor(ncw Color(r, g, );
B. gsetColor(new Color(r, g, );
C. setColor(new Color(r, g, );
D. gsetColor(Color(r, g, );
下列Applet使用drawLine()方法绘制矩形,左上角坐标为(20,40),长为60,宽为 40。请选择正确的语句填入横线处。 import java.awt.*; import java.applet.*; public class ex32 extends Applet { public void paint(Graphics g) { g.setColor(Color.blue); g.drawLine(20, 40, 80, 40); ______ g.drawLine(20, 80, 80, 80); g.drawLine(20, 80, 20, 40); } }
A. drawLme(80, 40, 80, 80);
B. drawLine(40, 40, 80, 80);
C. drawLine(80, 20, 80, 80);
D. drawLine(80, 40, 80, 80);