Java Writer append(CharSequence)方法及实例

Java中Writer类的append(CharSequence)方法用于将指定的CharSequence写入Writer中。这个CharSequence值被作为一个参数。

语法。

public Writer append(CharSequence charSequence)

参数。该方法接受一个强制性参数charSequence，它是要写入写入器中的CharSequence。

返回值。该方法返回这个Writer实例。

下面的方法说明了append(CharSequence)方法的工作。

程序 1:

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

输出:

GeeksForGeeks

程序2。

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

输出:

GFG