stringbufferconstructors.java

《Java面向对象程序设计》例子源代码.轻松学习书本.

//StringBufferConstructors.java
import javax.swing.*;
public class StringBufferConstructors {
   public static void main( String args[] ){
      //调用默认构造函数创建StringBuffer对象buffer1
      StringBuffer buffer1 = new StringBuffer();
      //调用指定初始容量的构造函数创建StringBuffer对象buffer2
      StringBuffer buffer2 = new StringBuffer( 10 );
      //调用指定初始字符串的构造函数创建StringBuffer对象buffer3
      StringBuffer buffer3 = new StringBuffer( "hello" );
      String output = "buffer1 = \"" + buffer1.toString() + "\"" +
         "\nbuffer2 = \"" + buffer2.toString() + "\"" +
         "\nbuffer3 = \"" + buffer3.toString() + "\"";
      JOptionPane.showMessageDialog( null, output,
         "StringBuffer类的构造函数的使用",                        								JOptionPane.INFORMATION_MESSAGE );
      System.exit( 0 );
   }
}