锐客网

  1. 首页 > 睿知 > it技术 > >

tanjava代码 java tan( 三 )

IT技术System


{
displayField.setText("");
start=false;
if(input.equals("+/-"))
displayField.setText(displayField.getText()+"-");
}
if(!input.equals("+/-"))
{
String str=displayField.getText();
if(input.equals("退格"))//退格键的实现方法
{
if(str.length()0)
displayField.setText(str.substring(0,str.length()-1));
}
else if(input.equals("C"))//清零键的实现方法
{
displayField.setText("0");
start=true;
}
else
displayField.setText(displayField.getText()+input);
}
}
else if (e.getActionCommand()=="二进制")//二进制的转换
{
int n=Integer.parseInt(displayField.getText());
displayField.setText(Integer.toBinaryString(n));
}
else if (e.getActionCommand()=="八进制")//八进制的转换
{
int n=Integer.parseInt(displayField.getText());
displayField.setText(Integer.toOctalString(n));
}
else if (e.getActionCommand()=="退出")//选项中退出的处理方法
{
System.exit(0);
}
else if (e.getActionCommand()=="用法")//按下'帮助'菜单栏中用法的处理方法
{
label_dialog.setText("sqrt,exp等键是先输运算符再输数字\n");
dialog.setLocation(400,250);
dialog.setVisible(true);
}
else//各运算符的识别
{
String command=e.getActionCommand();
if(start)
{
lastCommand=command;
}
else
{
calculate(Double.parseDouble(displayField.getText()));
lastCommand=command;
start=true;
}
}
}
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 arctanjava arctan是什么，让我们一起了解一下？
arctan是java中数学运算的三角函数方法，tan() 三角正切，通过编程Java代码实现，常用的还有cos() 三角余弦，sin()为 三角正弦，asin() 正弦的反函数，cos() 余弦的反函数，tan() 正切的反函数 。

推荐阅读


上一篇：gis棚格图片转为cad，gisshp转栅格

下一篇：erp信息系统的调研项目，erp系统应用调研报告