java操作檔案常用方式

如果你是想操作文字檔,
read:
BufferedReader br = new BufferedReader(new FileReader("/aaa/a.txt"));
String s = "":
while((s=br.readLine())!= null)
do .............

writer:

PrintWriter pw = new PrintWriter(new FileWriter("/out.txt"[,true])[,true]);
pw.println("1111");
第一個選擇性參數如果為真,內容為追加到原來的檔案後面,第二個選擇性參數為真為自動清空.否則只有在pw.close()才寫入/

如果是二進位檔案:
read:
DataInputStream dis = new DataInputStream(new BufferedInuputStream(new FileInputStream("/aaa/aaa.txt")));
do............
write:
DataOutputStream dos = new DataOutputStream(new BufferedOutuputStream(new FileOutputStream("/aaa/out.txt")));
do............

如果是隨機存取檔案
read:
RandomAccessFile f = new RandomAccessFile("/aaa/aaa.txt","r");
write:
RandomAccessFile f = new RandomAccessFile("/aaa/aaa.txt","rw");
RandomAccessFile f = new RandomAccessFile("/aaa/aaa.txt","r");

java流有60多種,總之你可以自由給合.