我想將隨機輸入字符串數組排列到一個表中，看起來使用循環和 if 函數或更簡單的東西。有最小、小、中、大、最大之分。并且字符串各重復 x5該數組是： String cow[][] = new String[5][5]; cow[0][0] = "big"; cow[0][1] = "smallest"; cow[0][2] = "small"; cow[0][3] = "medium"; cow[0][4] = "biggest"; cow[1][0] = "smallest"; cow[1][1] = "biggest"; cow[1][2] = "medium"; cow[1][3] = "small"; cow[1][4] = "big"; cow[2][0] = "medium"; cow[2][1] = "biggest"; cow[2][2] = "big"; cow[2][3] = "smallest"; cow[2][4] = "small"; cow[3][0] = "small"; cow[3][1] = "big"; cow[3][2] = "smallest"; cow[3][3] = "medium"; cow[3][4] = "biggest"; cow[4][0] = "biggest"; cow[4][1] = "medium"; cow[4][2] = "big"; cow[4][3] = "small"; cow[4][4] = "smallest";我的排列數組的代碼：for (int j = 0; j < cow.length; j++) { for (int i = 0; i < cow[j].length; i++) { if (cow[i][j] == "smallest") { System.out.print("| " + cow[i][j] + " |"); } else if (cow[i][j] == "small") { System.out.print("| " + cow[i][j] + " |"); } else if (cow[i][j] == "medium") { System.out.print("| " + cow[i][j] + " |"); } else if (cow[i][j] == "big") { System.out.print("| " + cow[i][j] + " |"); } else if (cow[i][j] == "biggest") { System.out.print("| " + cow[i][j] + " |"); } } System.out.println();}當我運行代碼時，我只得到最小的 |最小|最小|最小|最小|我認為這是因為循環沒有為其他索引重新循環（？），所以表不是 5x5我所期望的：smallest | small | medium | big | biggestsmallest | small | medium | big | biggestsmallest | small | medium | big | biggestsmallest | small | medium | big | biggestsmallest | small | medium | big | biggest請教我，因為我對java很陌生。謝謝
2 回答
繁星coding
TA貢獻1797條經驗 獲得超4個贊
在這里，我們使用 ArrayList 來存儲每一行，并使用 Collections 類對其進行排序，然后我們為每一行使用 StringJoiner 在值之間添加管道，您可以在代碼注釋中看到詳細信息。并記住導入所有必要的類
String cow[][] = new String[5][5];
cow[0][0] = "big";
cow[0][1] = "smallest";
cow[0][2] = "small";
cow[0][3] = "medium";
cow[0][4] = "biggest";
cow[1][0] = "smallest";
cow[1][1] = "biggest";
cow[1][2] = "medium";
cow[1][3] = "small";
cow[1][4] = "big";
cow[2][0] = "medium";
cow[2][1] = "biggest";
cow[2][2] = "big";
cow[2][3] = "smallest";
cow[2][4] = "small";
cow[3][0] = "small";
cow[3][1] = "big";
cow[3][2] = "smallest";
cow[3][3] = "medium";
cow[3][4] = "biggest";
cow[4][0] = "biggest";
cow[4][1] = "medium";
cow[4][2] = "big";
cow[4][3] = "small";
cow[4][4] = "smallest";
for (int i = 0; i < cow.length; i++) {
List<String> list = new ArrayList<>(); //list for saving each row
for (int j = 0; j < cow[i].length; j++) {
list.add(cow[i][j]);
}
Collections.sort(list); // sort array
Collections.reverse(list); // reverse array just for better order
String big = list.get(4); // since the biggest comes befor big
list.set(4, list.get(3)); // we need to change them
list.set(3, big);
for(int x=0;x<list.size();x++){
if(x<list.size()-1){ System.out.print(list.get(x)+" | "); }
else { System.out.println(list.get(x)); } }
} // end of outer loop
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