Java的座標誤差與陣列

Question

異常線程「main」 java.lang.ArrayIndexOutOfBoundsException

for (int i = 0; i < size; i++) { for (int j = i; j < size; j++) { 
    distances[i][j] = haversin(coords[i][0], coords[j][0], coords[i][1], 
    coords[j][1]); distances[j][i] = distances[i][j]; } } long start = 
    System.nanoTime(); int[] shortestPath = nearestNeighbour(distances); double 
    bestShort = 0; for (int i = 0; i < size; ++i) {bestShort += 
    distances[shortestPath[i] - 1][shortestPath[i + 1] - 1]; } bestShort += 
    distances[shortestPath[size - 1]][shortestPath[0]]; 
} 

Answer 1

PLZ編輯您的帖子，並把所有的代碼沒有圖像或一個方法。 那麼你必須隔離的操作（組織和檢測錯誤）： 例如：

bestShort += distances[shortestPath[i] - 1][shortestPath[i+1]-1];

到

int shortestPath,shortestPath_1; 
for (int i = 0; i < size; ++i) { 
shortestPath=shortestPath[i] - 1; 
shortestPath_1=shortestPath[i + 1] - 1; 
bestShort += distances[shortestPath][shortestPath_1]; 
} 

你應該在Eclipse中使用調試工具知道源的問題。你可以知道發生了什麼，並且可以得到變量值