Java中的 StringWriter append(CharSequence) 方法及示例

Java中StringWriter类的append(CharSequence)方法用于在writer上写入指定的CharSequence。将此 CharSequence 值作为参数。

句法：

public StringWriter append(CharSequence charSequence)

参数：此方法接受一个强制参数charSequence ，它是要写入 writer 的 CharSequence。

返回值：此方法返回此 StringWriter 实例。

下面的程序说明了 append(CharSequence) 方法的工作：

方案一：

// Java program to demonstrate
// StringWriter append(CharSequence) method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a StringWriter instance
            StringWriter writer
                = new StringWriter();
  
            // 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");
  
            System.out.println(writer.toString());
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

输出：

GeeksForGeeks

方案二：

// Java program to demonstrate
// StringWriter append(CharSequence) method
  
import java.io.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            // Create a StringWriter instance
            StringWriter writer
                = new StringWriter();
  
            // 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：