import java.util.*;public class ee {public static void main(String []agrs) { ? Scanner sc=new Scanner(System.in); ? System.out.println("告訴我你的寬?"); ? double wa=sc.nextDouble(); ? System.out.println("告訴我你的長(zhǎng)?"); ? double da=sc.nextDouble(); ? System.out.println("告訴我你的高?"); ? double ha=sc.nextDouble(); ? parallelepiped wm=new parallelepiped(); ? wm.setwidth(wa); ? wm.setdepth(da); ? wm.setheight(ha); ? System.out.println("面積="+wm.getsurface()+"體積="+wm.getvolume()+"周長(zhǎng)="+wm.getlength());}}class parallelepiped{ private double width,depth,height; public static void setwidth(double wa) { double width=wa; } public double width() { return width; } public static void setdepth(double da) { double depth=da; } public double getdepth() { return depth; } public static void setheight(double ha) { double height=ha; } public double getheight() { return height; } public double getsurface() { return width*depth; } public double getvolume() { return width*depth*height; } public double getlength() { return (width+depth)*2; } public String tostring() { return "面積是="+getsurface()+"體積是="+getvolume()+"周長(zhǎng)是="+getlength(); } ?}為什么我輸入長(zhǎng)，寬，高的數(shù)值后，最后計(jì)算結(jié)果都是0.0？比如用戶回答寬是2，長(zhǎng)2，高3，那么面積不可能算出來(lái)是0.0的啊