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java退格键运行代码 java里面如何退格( 四 )

IT技术H3bpm


}
}
public void calculate(double x)//各运算符的具体运算方法
{
double d=0;
if (lastCommand.equals("+"))
result+= x;
else if (lastCommand.equals("-"))
result-=x;
else if (lastCommand.equals("*"))
result*=x;
else if (lastCommand.equals("/"))
result/=x;
else if (lastCommand.equals("="))
result=x;
else if (lastCommand.equals("sqrt"))
{
d=Math.sqrt(x);
result=d;
}
else if (lastCommand.equals("exp"))
{
d=Math.exp(x);
result=d;
}
else if (lastCommand.equals("log"))
{
d=Math.log(x);
result=d;
}
else if (lastCommand.equals("tan"))
{
d=Math.tan(x);
result=d;
}
else if (lastCommand.equals("cos"))
{
d=Math.cos(x);
result=d;
}
else if (lastCommand.equals("sin"))
{
d=Math.sin(x);
result=d;
}
displayField.setText(""+ result);
}
public void windowClosing(WindowEvent e)
{
if(e.getSource()==dialog)
dialog.setVisible(false);//隐藏对话框
else
System.exit(0);
}
public void windowOpened(WindowEvent e){}
public void windowActivated(WindowEvent e){}
public void windowDeactivated(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
public static void main(String args[])
{
Calculator calculator=new Calculator();
}
}
class WinClose implements WindowListener
{
public void windowClosing(WindowEvent e)//单击窗口关闭按钮时触发并执行实现窗口监听器接口中的方法
{
System.exit(0);//结束程序运行
}
public void windowOpened(WindowEvent e){}
public void windowActivated(WindowEvent e){}
public void windowDeactivated(WindowEvent e){}
public void windowClosed(WindowEvent e){}
public void windowIconified(WindowEvent e){}
public void windowDeiconified(WindowEvent e){}
}
JAVA 中 按回车键退出的 程序代码怎么写？import java.io.IOException;
public class TestEnter {
public static void main(String[] args) throws IOException{
while(true){
if(System.in.read() == '\n')
System.exit(0);
}
}
}
Java实现“按任意键退出”System.out.println("***********************************");
System.out.println("\n请输入java退格键运行代码你要选择java退格键运行代码的操作:\n 1:进入..\n 2:进入...:\n其它任一键java退格键运行代码：退出\n");
System.out.println("***********************************");
try
{
BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
String str=in.readLine();
int chioce=Integer.parseInt(str);
switch(chioce)
{
case 1: break;
case 2: break;
default: System.exit(0);
}
}
catch(NumberFormatException e){System.exit(0);}
catch(IOException ie){System.exit(0);}
java 退格键的控制字符是什么？是的啊 ， 退格就是\b 。你可以用e.KeyCode==8试试 。bs(backspace)
我这里有一个ascii码，你以后可以对照看
java 写计算器的退格键怎么写，如“123456”按下退格变“12345”String str = "12345";
str = str.substring(0, str.length()-1);
int a = Integer.parseInt(str);
java退格键运行代码的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于java里面如何退格、java退格键运行代码的信息别忘了在本站进行查找喔 。

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