Java中的 PrintWriter println() 方法及示例

Java中PrintWriter类的println()方法用于在流中换行。此方法不接受任何参数或返回任何值。

句法：

public void println()

参数：此方法不接受任何参数。

Return ：此方法不返回任何值。

下面的方法说明了 println() 方法的工作：

方案一：

// Java program to demonstrate
// PrintWriter println() method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a PrintWriter instance
            PrintWriter writer
                = new PrintWriter(System.out);
  
            // Print the value 'GFG'
            // to this stream using print() method
            // This will put the  in the
            // stream till it is printed on the console
            writer.print("GFG");
  
            // Break the line in the stream
            // using println() method
            writer.println();
  
            writer.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：

GFG

方案二：

// Java program to demonstrate
// PrintWriter println() method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a PrintWriter instance
            PrintWriter writer
                = new PrintWriter(System.out);
  
            // Print the  value '1.65'
            // to this stream using print() method
            // This will put the  in the
            // stream till it is printed on the console
            writer.print(1.65);
  
            // Break the line in the stream
            // using println() method
            writer.println();
  
            writer.flush();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：

1.65