java控制台输出方式_Java的三种简单的控制台输入和输出方式

//控制台输出

public static void ScannerInputAndOut(){

Scanner in = new Scanner(System.in);

System.out.println(in.nextLine());

}

/**

* 字节流

*/

public static void ByteInputAndOut(){

//输入

BufferedInputStream in = new BufferedInputStream(System.in);

try {

byte[] b = new byte[1024];

in.read(b);

System.out.println(new String(b));

} catch (IOException e) {

e.printStackTrace();

}

//输出

BufferedOutputStream out = new BufferedOutputStream(System.out);

try {

for (int i = 0; i < 5; i++) {

out.write("hello".getBytes());

}

out.close();

} catch (IOException e) {

e.printStackTrace();

}

}

/**

* 字符流

*/

public static void CharInputAndOut(){

//输入

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

try {

System.out.println(in.readLine());

} catch (IOException e) {

e.printStackTrace();

}

//输出

BufferedWriter out = new BufferedWriter(new OutputStreamWriter(System.out));

try {

for (int i = 0; i < 5; i++) {

out.write("hello"+i);

out.newLine();

}

out.close();

} catch (IOException e) {

e.printStackTrace();

}

}