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問(wèn)題描述
我正在嘗試使用BufferedWriter將2D數(shù)組存儲(chǔ)在文本文件中，我還希望使用BufferedReader從文本文件中檢索2D數(shù)組并以其原始數(shù)組格式顯示。這兩種方法我都沒(méi)什么經(jīng)驗(yàn)。
要保存在txt文件中的預(yù)期結(jié)果為：
1 5 7 8 2 3 9 6 4
4 8 3 7 6 9 2 1 5
6 2 9 5 1 4 7 3 8
5 3 1 9 4 2 6 8 7
2 7 4 3 8 6 5 9 1
8 9 6 1 7 5 3 4 2
9 4 8 2 3 7 1 5 6
3 6 2 4 5 1 8 7 9
7 1 5 6 9 8 4 2 3
BufferedWriter：
// Instantiate a Date object
static Date date = new Date();
static int[][] board = {{0, 0, 5, 9, 7, 1, 8, 4, 6},
{0, 7, 1, 2, 8, 6, 9, 3, 5},
{0, 9, 6, 4, 3, 5, 2, 7, 1},
{0, 6, 8, 7, 4, 9, 5, 2, 3},
{0, 4, 9, 5, 2, 3, 1, 6, 8},
{0, 5, 2, 1, 6, 8, 4, 9, 7},
{0, 2, 4, 8, 1, 7, 3, 5, 9},
{0, 1, 3, 6, 5, 2, 7, 8, 4},
{0, 8, 7, 3, 9, 4, 6, 1, 2}};
try {
File file = new File("/c:/sudoku" + date + ".txt");
if (!file.exists()) {
file.createNewFile();
}
FileWriter fw = new FileWriter(file.getAbsoluteFile());
try (BufferedWriter bw = new BufferedWriter(fw)) {
bw.write(board, 0, board.length());
}
System.out.println("Your Game was saved with success !");
} catch (IOException e) {
}
推薦答案
我建議(和Bob一樣)將其存儲(chǔ)為csv格式(逗號(hào)分隔值)
Date date = new Date();
int[][] board = {{0, 0, 5, 9, 7, 1, 8, 4, 6},
{0, 7, 1, 2, 8, 6, 9, 3, 5},
{0, 9, 6, 4, 3, 5, 2, 7, 1},
{0, 6, 8, 7, 4, 9, 5, 2, 3},
{0, 4, 9, 5, 2, 3, 1, 6, 8},
{0, 5, 2, 1, 6, 8, 4, 9, 7},
{0, 2, 4, 8, 1, 7, 3, 5, 9},
{0, 1, 3, 6, 5, 2, 7, 8, 4},
{0, 8, 7, 3, 9, 4, 6, 1, 2}};
StringBuilder builder = new StringBuilder();
for(int i = 0; i < board.length; i++)//for each row
{
for(int j = 0; j < board.length; j++)//for each column
{
builder.append(board[i][j]+"");//append to the output string
if(j < board.length - 1)//if this is not the last row element
builder.append(",");//then add comma (if you don't like commas you can use spaces)
}
builder.append("
");//append new line at the end of the row
}
BufferedWriter writer = new BufferedWriter(new FileWriter("/c:/sudoku" + date + ".txt"));
writer.write(builder.toString());//save the string representation of the board
writer.close();
希望一切正常
編輯：
以下是如何重讀您的黑板：
String savedGameFile = /*...*/;
int[][] board = new int[9][9];
BufferedReader reader = new BufferedReader(new FileReader(savedGameFile));
String line = "";
int row = 0;
while((line = reader.readLine()) != null)
{
String[] cols = line.split(","); //note that if you have used space as separator you have to split on " "
int col = 0;
for(String c : cols)
{
board[row][col] = Integer.parseInt(c);
col++;
}
row++;
}
reader.close();
這篇關(guān)于如何用BufferedWriter將二維數(shù)組保存為文本文件？的文章就介紹到這了，希望我們推薦的答案對(duì)大家有所幫助，
