[問題] java.io

[byemark (白馬克)]

//正常的方法 先做input再做output
File file = new File("test.txt");
DataInputStream din = new DataInputStream(new FileInputStream(file);
int cnt = din.readInt();
din.close();
DataOutputStream dout = new DataOutputStream(new FileOutputStream(file));
dout.writeInt(++cnt);
dout.close();

//有問題的方法
File file = new File("test.txt");
DataInputStream din = new DataInputStream(new FileInputStream(file);
DataOutputStream dout = new DataOutputStream(new FileOutputStream(file));
int cnt = din.readInt();
dout.writeInt(++cnt);
din.close();
dout.close();

一做readInt()就跳出EOFException
怎麼會這樣咧...
是因為我對同樣的檔案同時做存取的關係嗎?

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推 puzi:通常不會對同一個檔案做存取吧..太多case要考慮了~.~"