Java StringBuffer类

import java.lang.*;

public class StringBufferDemo {

   public static void main(String[] args) {

      StringBuffer buff = new StringBuffer("tuts ");

      System.out.println("buffer = " + buff);



      // appends the boolean argument as string to the string buffer

      buff.append(true);



      // print the string buffer after appending

      System.out.println("After append = " + buff);

      buff = new StringBuffer("abcd ");

      System.out.println("buffer = " + buff);



      // appends the boolean argument as string to the string buffer

      buff.append(false);



      // print the string buffer after appending

      System.out.println("After append = " + buff);

   }

}