问大家一个问题，我不知道我写的程序哪错了

[adot111]

import javax.swing.*;
public class App{
public static void main(String[] agrs){

Radian call = new Radian();

String input = JOptionPane.showInputDialog(" please input the radian");
double r = Double.parseDouble(input);

call.setRad(r);

String input1 = JOptionPane.showInputDialog(" please input the degrees");
double d = Double.parseDouble(input1);

call.setDeg(d);

System.out.println("radian is " + call.volumnDtoR() + "\ndegrees is " + call.volumnRtoD());

System.exit(0);
}
}


public class Radian{
//date field
private double radians;
private double degrees;

public void setRad(double r){
radians = r;
}

public void setDeg(double d){
degrees = d;
}

public double getRed(){
return radians;
}

public double getDeg(){
return degrees;
}

public double volumnDtoR(){
return (Math.PI/180) * degrees;
}

public double volumnRtoD(){
return (180/Math.PI) *radians ;
}

}


得出来的结果怎么不对呢？
例如，我如果输入 3.14（pi），结果应该为180左右，而当我输入360的时候，应该显示为6.28。
但是我的结果并不是这样，为什么呢？

[lighteen]

没有错误啊

输入：
3.1415926
180

输出：
radian is 3.141592653589793
degrees is 179.99999692953102

[helpall]

结果挺好的.什么问题?
Input:
radian is 3.14159265
degrees is 180.0

radian is 3.141592653589793
degrees is 179.99999979432

[hellomartin]

你干脆把180改成180.0试试看!!!

[i_am_acheng]

输出
radian is 6.283185307179586
degrees is 179.9087476710785