Java 为什么会出现短线段而不是完整的直线图?
我的自定义画布扩展了画布,并覆盖了paint()方法,如下所示Java 为什么会出现短线段而不是完整的直线图?,java,awt,linegraph,Java,Awt,Linegraph,我的自定义画布扩展了画布,并覆盖了paint()方法,如下所示 @Override public void paint(Graphics g) { Rectangle bounds = getBounds(); g.translate(0, (bounds.y + bounds.height) / 2); int maxX = (int) bounds.getMaxX(); g.drawLine(currX, currY, currX + 5, m_nex
@Override
public void paint(Graphics g) {
Rectangle bounds = getBounds();
g.translate(0, (bounds.y + bounds.height) / 2);
int maxX = (int) bounds.getMaxX();
g.drawLine(currX, currY, currX + 5, m_nextY);
currX = currX > maxX ? maxX : currX + 5;
currY = m_nextY;
if (currX >= maxX) {
currX = 0;
}
}
int currX = 0;
int currY = 0;
int m_nextY;
public void setNextY(int pNext) {
m_nextY = pNext;
}
程序入口点运行一个循环来检索按比例缩放的随机数,并设置Y坐标的位置,如下所示
java.util.Random engine = new Random();
while (Thread.currentThread().isAlive()) {
myCanvas.setNextY((int) (engine.nextFloat() * -15f));
myCanvas.paint(getGraphics());
try {
Thread.sleep(300);
} catch (InterruptedException ex) {
// Balderdash!
}
}
这里的预期输出应该是一个折线图。取而代之的是一个具有不同位置和姿态的单一短段
我做错了什么
引擎是java.util.Random的一个实例