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This article mainly introduces the JAVA language input and output stream sample code, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Public class IOStreamDemo {

Public void samples () throws IOException {

/ / 1. This is reading a line of data from the keyboard and returning a string.

BufferedReader stdin = new BufferedReader (new InputStreamReader (System.in))

System.out.print ("Enter a line:")

System.out.println (stdin.readLine ())

/ / 2. This is to read the data line by line from the file

BufferedReader in = new BufferedReader (new FileReader ("IOStreamDemo.java"))

String s, S2 = new String ()

While ((s = in.readLine ())! = null)

S2 + = s + ""

In.close ()

/ / 3. This is to read bytes one by one from a string

StringReader in1 = new StringReader (S2)

Int c

While ((c = in1.read ())! =-1)

System.out.print ((char) c)

/ / 4. This is to write a string to the file

Try {

BufferedReader in2 = new BufferedReader (new StringReader (S2))

PrintWriter out1 = new PrintWriter (new BufferedWriter (new FileWriter ("IODemo.out")

Int lineCount = 1

While ((s = in2.readLine ())! = null)

Out1.println (lineCount++ + ":" + s)

Out1.close ()

} catch (EOFException e) {

System.err.println ("End of stream")

}

}

}

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