System.in的用法

方法1

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
Scanner scanner=new Scanner(System.in);
String inputStr=null;

try {
 //   while ((inputStr = br.readLine())!=null) {
    while ((inputStr = scanner.next())!=null) {
            mychat.sendMessage(inputStr);
    }
}catch (Exception ex){}


方法2： while(true);
方法3：object.wait （ 获取锁后）