Java PrintStream setError()用法及代碼示例

Java中PrintStream類的setError()方法用於設置此PrintStream實例的錯誤狀態。此方法用作指示符，以指示流中已發生錯誤。它受到保護，因此需要通過派生PrintStream類來使用它來實現。

用法:

protected void setError()

參數：此方法不接受任何參數。

返回值：此方法不返回任何內容。

下麵的方法說明了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); 
        } 
    } 
}

輸出：

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); 
        } 
    } 
}

輸出：

相關用法

注：本文由純淨天空篩選整理自Kirti_Mangal大神的英文原創作品 PrintStream setError() method in Java with Examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。