Java PrintStream setError()用法及代码示例

Java中PrintStream类的setError()方法用于设置此PrintStream实例的错误状态。此方法用作指示符，以指示流中已发生错误。它受到保护，因此需要通过派生PrintStream类来使用它来实现。

用法:

protected void setError()

参数：此方法不接受任何参数。

返回值：此方法不返回任何内容。

下面的方法说明了setError()方法的用法方式：

示例1:

// Java program to demonstrate 
// PrintStream setError() method 
  
import java.io.*; 
  
// extending the PrintStream Class 
class GFG extends PrintStream { 
  
    // Defining the protected constructor 
    public GFG(OutputStream out) 
    { 
        super(System.out); 
    } 
  
    // Driver Code 
    public static void main(String[] args) 
    { 
  
        // The string to be written in the Stream 
        String str = "GeeksForGeeks"; 
  
        try { 
  
            // Create a GFG instance 
            GFG stream 
                = new GFG(System.out); 
  
            // Write the above string to this stream 
            // This will put the string in the stream 
            // till it is printed on the console 
            stream.print(str); 
  
            stream.flush(); 
  
            // Use the protected setError() method 
            stream.setError(); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

输出：

GeeksForGeeks

示例2:

// Java program to demonstrate 
// PrintStream setError() method 
  
import java.io.*; 
  
// extending the PrintStream Class 
class GFG extends PrintStream { 
  
    // Defining the protected constructor 
    public GFG(OutputStream out) 
    { 
        super(System.out); 
    } 
  
    // Driver Code 
    public static void main(String[] args) 
    { 
  
        try { 
  
            // Create a GFG instance 
            GFG stream 
                = new GFG(System.out); 
  
            // Write the char to this stream 
            // This will put the char in the stream 
            // till it is printed on the console 
            stream.write(65); 
  
            stream.flush(); 
  
            // Use the protected setError() method 
            stream.setError(); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

输出：

相关用法

注：本文由纯净天空筛选整理自Kirti_Mangal大神的英文原创作品 PrintStream setError() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。