在我的掃描儀上找不到符號

Question

試圖創建一個程序，允許您輸入圖片框和圖片的長度/寬度，然後比較兩者以查看是否適合放入其他圖片。簡單的東西，因爲我是新來的Java，但我離題 - 這裏是代碼：

import java.util.Scanner; 

public class pictureFrame { 
    public static void main(String[] args) { 
     double x = 0; 
     double y = 0; 
     double u = 0; 
     double v = 0; 

     xScanner = new Scanner(System.in); 
     yScanner = new Scanner(System.in); 
     uScanner = new Scanner(System.in); 
     vScanner = new Scanner(System.in); 

     System.out.println("Enter the length of the picture"); 
     x = xScanner.nextDouble(); 
     System.out.println("Enter the width of the picture"); 
     y = yScanner.nextDouble(); 
     System.out.println("Enter the length of the frame"); 
     u = uScanner.nextDouble(); 
     System.out.println("Enter the width of the frame"); 
     v = vScanner.nextDouble(); 

     if (x = u && y = v) 
     { 
     System.out.println("The frame fits the picture!"); 
     } 
     else if (x == v && y == u) 
     { 
      System.out.println("The frame fits the picture!"); 
     } 
       else 
       { 
        System.out.println("The frame does not fit the picture"); 
       } 

     } 

    } 
    } 

而且我得到8個錯誤，都說明他們無法爲每個以下的行中的第一個字符查找符號：

xScanner = new Scanner(System.in); 
    yScanner = new Scanner(System.in); 
    uScanner = new Scanner(System.in); 
    vScanner = new Scanner(System.in); 
    x = xScanner.nextDouble(); 
    y = yScanner.nextDouble(); 
    u = uScanner.nextDouble(); 
    v = vScanner.nextDouble(); 

對不起，如果這個問題很愚蠢，我確實使用了搜索功能。

Answer 1

你忘了掃描儀在語句的前面，也..你只需要聲明一次掃描：

Scanner scan = new Scanner(System.in); 
x = scan.nextDouble(); 
y = scan.nextDouble(); 
//etc..