焊接性
参考答案：
金属材料的焊接性是指在限定的施工条件下，焊接成按规定设计要求的构件，并满足预定服役要求的能力。
汽车装载的货物越高，转弯时稳定性越差。
在以下程序中，鼠标单击小应用程序的某一点，则会在该点显示一个图标，如果双击，则会清除该图标。且在浏览器的状态栏上会显示鼠标单击位置的坐标。运行结果如下图所示。请改正程序中的错误(有下划线的语句)，使程序能输出正确的结果。
注意：不改动程序的结构，不是增行或删行。 import java.applet.*; import java.awt.*; import java.awt.event.*; public class Example3_1 extends Applet { int xPoint, yPoint; int sum; Image displayIm; public void init() { displayIm = getImage("ms.jpg"); addMouseListener(new SClickMouse()) ; sum = 2; } public void paint(Graphics g) { if(sum == 1) g.drawImage(displayIm, xPoint, yPoint, this); else g.fillRect(xPoint, yPoint, 60, 60); } public class SClickMouse implements MouseListener { public void mouseClicked(MouseEvent mouse) { sum = mouse.getClickCount(); xPoint = mouse.getX(); yPoint = mouse.getY(); paint(); } public void mouseEntered(MouseEvent mouse) { } public void mouseExited(MouseEvent mouse) {} public void mousePressed(MouseEvent mouse) { xPoint = mouse.getX(); yPoint = mouse.getY(); showStatus("x="+xPoint+",y-"+yPoint); } public void mouseReleased(MouseEvent mouse) } } } } Exampie3_1.html: ＜html＞ ＜head＞＜title＞Example3_1＜/title＞＜/head＞ ＜body＞ ＜applet code="Example3_1.class" width="400" height="500"＞ ＜/applet＞ ＜/body＞ ＜/html＞
注意：不改动程序的结构，不是增行或删行。 import java.applet.*; import java.awt.*; import java.awt.event.*; public class Example3_1 extends Applet { int xPoint, yPoint; int sum; Image displayIm; public void init() { displayIm = getImage("ms.jpg"); addMouseListener(new SClickMouse()) ; sum = 2; } public void paint(Graphics g) { if(sum == 1) g.drawImage(displayIm, xPoint, yPoint, this); else g.fillRect(xPoint, yPoint, 60, 60); } public class SClickMouse implements MouseListener { public void mouseClicked(MouseEvent mouse) { sum = mouse.getClickCount(); xPoint = mouse.getX(); yPoint = mouse.getY(); paint(); } public void mouseEntered(MouseEvent mouse) { } public void mouseExited(MouseEvent mouse) {} public void mousePressed(MouseEvent mouse) { xPoint = mouse.getX(); yPoint = mouse.getY(); showStatus("x="+xPoint+",y-"+yPoint); } public void mouseReleased(MouseEvent mouse) } } } } Exampie3_1.html: ＜html＞ ＜head＞＜title＞Example3_1＜/title＞＜/head＞ ＜body＞ ＜applet code="Example3_1.class" width="400" height="500"＞ ＜/applet＞ ＜/body＞ ＜/html＞