Java StringWriter append(char)方法及实例

Java中StringWriter类的append(char)方法用于在写入器上追加指定的char值。这个char值被作为一个参数。

语法。

public void append(char charValue)

参数。这个方法接受一个强制性的参数charValue，它是要附加到写入器上的char值。

返回值。这个方法不返回任何值。

下面的程序说明了append(char)方法的工作。

程序1:

// Java program to demonstrate
// StringWriter append(char) method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a StringWriter instance
            StringWriter writer
                = new StringWriter();
  
            // Append the char value 'A'
            // to this writer using append() method
            // This will put the charValue in the
            // writer till it is appended on the console
            writer.append('A');
  
            System.out.println(writer.toString());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出:

程序2。

// Java program to demonstrate
// StringWriter append(char) method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a StringWriter instance
            StringWriter writer
                = new StringWriter();
  
            // Append the char value 'G'
            // to this writer using append() method
            // This will put the charValue in the
            // writer till it is appended on the console
            writer.append('G');
  
            System.out.println(writer.toString());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}