简答应用题
1.下面程序运行后，可以使用上下左右键移动组件。 补充下画线部分的代码。
import .*;
import t.*;
public class E6 extends Frame implements keyListener
{
TextField b1;
int x,y;
E6()
{
setLayout (new FlowLayout());
b1 = new TextField("走");
__[1]__
eyListener(this);
setSize (200,120);
addWindowListener(new WindowListener()
{
public void windowClosing(WindowEvent e)
{
(0);
}
});
}
public void keyPressed(KeyEvent e)
{
x=ouds().x;
y=ouds().y;
if(eyCode()==__[2]__)
{
y=y-3;
if(y<=1)y=50;
ocation(x,y);
}
if(eyCode()==_DOWN)
{
y=y+3;
if(y>=100)y=50;
ocation(x,y);
}
if(eyCode()==_LEFT)
{
x=x-3;
if(x<=1)x=50;
__[3]__;
}
if(eyCode()==_RIGHT)
{
x=x+3;
if(x>=100)x=50;
ocation(x,y);
}
}
public void keyTyped(KeyEvent e)
{}
public void keyReleased(KeyEvent e)
{}
public static void main (String args[])
{
E6 a = new E6();
__[4]__;
}
}
2.下面程序是从命令窗口界面输入圆半径，然后计算球圆面积与周长。把划线部分填上语句，将程序补充完整。
import .*;
public class Qiumianji
{
public static void main (String args[ ])
{
int a = 0;
double b,c;
Sting s;
try{
BufferedReader br =new BufferedReader (new InputStreamReader (___【1】__));
s = Line();
a = __【2】__;
}
catch(IOExcepion e)
{}
b = 3.14*a*a;
c = 2*3.14*a;
tln(”该圆面积为”+b+””+”周长为”+c);
}
}
