今天看了IO部分
File f = new File(name)
f.exist()
f.canWrite()
f.isDirectory()
f.delete()
f.getName(0
f.getParent()
String files = f.list()
....
System.out.flush() 是程序停住
BufferReader in = new BufferReader(new InputStreamReader(System.in));
String line = in.readLine()
創建文件流
from = new FileInputStream(name)
to = new FileOutputStream(name2)
from.read()
to.write()
while((bytes_read = from.read(buffer))!=-1)判斷是否讀到文件末尾