有IO就要Close
FileInputStream in=null;//定義一個管子
in=new FileInputStream("地址")//兌到目標文件,期間要捕獲異常
輸出
int b = 0;
FileInputStream in = null;
try {
in = new FileInputStream("f://TDDOWNLOAD//[Core.Java基礎教程]_楊帆_Circular.java");
} catch (Exception e) {
System.out.println("找不到該文件");
System.exit(-1);
}
try {
long num = 0;
while ((b = in.read()) != -1
) {//只要不等於-1就沒有讀完程序,最重要
System.out.println((char) b);//轉換成字符
num++;
}
in.close();
System.out.println();
System.out.println("共讀取了" + num + "個字符");
} catch (Exception e) {
System.out.println("文件讀取錯誤");
System.exit(-1);