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📜  Java中的 PrintWriter println() 方法及示例

📅  最后修改于: 2022-05-13 01:54:55.474000             🧑  作者: Mango

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