獲取在Java錯誤而編譯或運行

Question

我新的Java和我已經從維基教科書下載的PDF文檔，並試圖運行一個程序我收到以下錯誤：

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 
at Distance.main(Distance.java:7) 

這是代碼我試圖運行：

public class Distance 
{ 
    private java.awt.Point point0, point1; 
    public Distance(int x0, int y0, int x1, int y1) 
    { 
     point0 = new java.awt.Point(x0, y0); 
     point1 = new java.awt.Point(x1, y1); 
    } 

    public void printDistance() 
    { 
     System.out.println("Distance between " + point0 + " and " + point1 
      + " is " + point0.distance(point1)); 
    } 

    public static void main(String[] args) 
    { 
     Distance dist = new Distance(
     intValue(args[0]), intValue(args[1]), 
     intValue(args[2]), intValue(args[3])); 
     dist.printDistance(); 
    } 

    private static int intValue(String data) 
    { 
     return Integer.parseInt(data); 
    } 
} 

Answer 1

您沒有提供參數給命令行java調用或在您的IDE配置。

看來它需要四個整數參數，如：

java Distance 0 1 2 3