Java PrintWriter close()用法及代碼示例

Java中的PrintWriter類的close()方法用於關閉流。關閉流會釋放其中的任何值或與之關聯的任何資源。關閉後的PrintWriter實例將無法使用。同樣，一旦關閉，PrintWriter實例也無法再次關閉。

用法:

public void close()

參數：此方法不接受任何參數。

返回值：此方法不返回任何值。它隻是關閉流。

下麵的方法說明了close()方法的用法方式：

示例1:

// Java program to demonstrate 
// PrintWriter close() 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 close the stream 
            // using close() method 
            writer.close(); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

輸出：

GeeksForGeeks

示例2:

// Java program to demonstrate 
// PrintWriter close() 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 close the stream 
            // using close() method 
            writer.close(); 
        } 
        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 PrintWriter close() 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。