stringreader

StringReader类ready()方法 (StringReader Class ready() method)

• ready() method is available in java.io package.

  ready()方法在java.io包中可用。

• ready() method is used to check whether this StringReader stream is ready to be read or not.

  ready()方法用于检查此StringReader流是否已准备好被读取。

• ready() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  ready()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• ready() method may throw an exception at the time of checking the state of the stream.

  在检查流的状态时， ready()方法可能会引发异常。

  IOException: This exception may throw when getting any input/output error while performing.

  IOException ：在执行过程中遇到任何输入/输出错误时，可能引发此异常。

Syntax:

句法：

public boolean ready();

Parameter(s):

参数：

• It does not accept any parameter.

  它不接受任何参数。

Return value:

返回值：

The return type of the method is boolean, it returns true when input is available for the next read without blocking otherwise it returns false.

该方法的返回类型为boolean ，当输入可用于下一个读取而没有阻塞时返回true，否则返回false。

Example:

例：

// Java program to demonstrate the example // of boolean ready() method of StringReaderimport java.io.*;public class ReadyOfSR {
       public static void main(String[] args) throws Exception {
           StringReader str_r = null;        try {
               // Instantiates StringReader            str_r = new StringReader("JavaWorld!");            // By using ready() method is to check             // whether this stream str_r is ready to             // be read or not            boolean status = str_r.ready();            System.out.println("str_r.ready(): " + status);        } catch (Exception ex) {
               System.out.println(ex.toString());        } finally {
               // with the help of this block is to            // free all necessary resources linked            // with the stream            if (str_r != null) {
                   str_r.close();            }        }    }}

Output

输出量

str_r.ready(): true

翻译自:

stringreader