Java PrintWriter checkError()用法及代碼示例

Java中PrintWriter類的checkError()方法用於檢查此PrintWriter實例的錯誤狀態。此方法刷新流以檢查錯誤狀態。它返回一個布爾值，該值指示流是否遇到任何錯誤。

用法:

public boolean checkError()

參數：此方法不接受任何參數。

返回值：此方法返回一個布爾值，該值指示Stream是否遇到任何錯誤。如果遇到任何錯誤，則返回true。否則返回false。

下麵的方法說明了checkError()方法的用法方式：

示例1:

// Java program to demonstrate 
// PrintWriter checkError() method 
  
import java.io.*; 
  
class GFG { 
    public static void main(String[] args) 
    { 
  
        // The string to be written in the Writer 
        String str = "GeeksForGeeks"; 
  
        try { 
  
            // Create a PrintWriter instance 
            PrintWriter writer 
                = new PrintWriter(System.out); 
  
            // Write the above string to this writer 
            // This will put the string in the stream 
            // till it is printed on the console 
            writer.write(str); 
  
            // Now check the stream 
            // using checkError() method 
            System.out.println("\nHas any error occurred: "
                               + writer.checkError()); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

輸出：

GeeksForGeeks
Has any error occurred: false

示例2:

// Java program to demonstrate 
// PrintWriter checkError() method 
  
import java.io.*; 
  
class GFG { 
    public static void main(String[] args) 
    { 
  
        try { 
  
            // Create a PrintWriter instance 
            PrintWriter writer 
                = new PrintWriter(System.out); 
  
            // Write the char to this writer 
            // This will put the char in the stream 
            // till it is printed on the console 
            writer.write(65); 
  
            // Now check the stream 
            // using checkError() method 
            System.out.println("\nHas any error occurred: "
                               + writer.checkError()); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

輸出：

A
Has any error occurred: false

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 PrintWriter checkError() 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。