#    
#  Overview
The #key# static: method accessible with class name #key# **`System.setErr()`** function is used to reassign the standard error output stream.

##
## Syntax

---
```java
static void setErr(PrintStream error)
```
---

## Parameters
* `error`: the new standard error output stream.

## Return value
This function does not return a value.

> **`SecurityException`**: In this exception, the `checkPermission()` method does not allow the user to reassign the latest standard error output stream when the security manager exists.
## Example
The code below demonstrates how the `setErr()` function works in Java.

// Load java input output package
import java.io.*;
// Main class
public class EdPresso {  
    public static void main(String[] args) throws FileNotFoundException {  
        OutputStream outst = new FileOutputStream("file1.txt");  
        PrintStream _printStream = new PrintStream(outst);  
        // set current standarad error output stream
        System.setErr(_printStream);  
        System.out.println("Task completed!");  
    }  
}  


What is the System.setErr() function in Java?

Reassign the standard error output stream in Java using System.setErr(PrintStream). No return value.