流程类的getErrorStream()方法 (Process Class getErrorStream() method)
getErrorStream() method is available in java.lang package.
getErrorStream()方法在java.lang包中可用。
getErrorStream() method is used to get the error stream of the processes or subprocess.
getErrorStream()方法用于获取流程或子流程的错误流。
getErrorStream() 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.
getErrorStream()方法是一个非静态方法,只能使用类对象访问,如果尝试使用类名称访问该方法,则会收到错误消息。
getErrorStream() method does not throw an exception at the time of returning input stream.
返回输入流时, getErrorStream()方法不会引发异常。
Syntax:
句法:
public abstract InputStream getErrorStream();
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 this method is InputStream, it returns InputStream associated to the error stream of the process and subprocess.
此方法的返回类型为InputStream ,它返回与流程和子流程的错误流关联的InputStream。
Example:
例:
// Java program to demonstrate the example
// of InputStream getErrorStream() method
// of Process
import java.io.*;
import java.util.*;
public class GetErrorStream {
public static void main(String[] args) throws Exception {
// Instantiating Process object
System.out.println("Process Instantiated");
Process pr = Runtime.getRuntime().exec("notepad.exe");
// By using errorStream() method is to get the
// error stream of pr object
InputStream is = pr.getErrorStream();
// Read from InputStream
for (int k = 0; k < is.available(); ++k)
System.out.println("Error stream = " + is.read());
// Destroy a process
pr.destroy();
System.out.println("Process Destroyed");
}
}
Output
输出量
Process Instantiated
Process Destroyed
翻译自: https://www.includehelp/java/process-geterrorstream-method-with-example.aspx
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