stringbufferappend.java

《Java面向对象程序设计》例子源代码.轻松学习书本.

//StringBufferAppend.java
import javax.swing.*;
public class StringBufferAppend {
   public static void main( String args[] ){
      Object objectRef = "hello"; 
      String string = "goodbye";  
      char charArray[] = { 'a', 'b', 'c', 'd', 'e', 'f' };
      boolean booleanValue = true;
      char characterValue = 'Z';
      int integerValue = 7;
      long longValue = 10000000;
      float floatValue = 2.5f; 
      double doubleValue = 33.333;
      StringBuffer lastBuffer = new StringBuffer( "last StringBuffer" );
      StringBuffer buffer = new StringBuffer();
      buffer.append( objectRef );			//添加Object类型的值
      buffer.append( "  " );   			//添加两个空格作为分割
      buffer.append( string );			//添加String类型的值
      buffer.append( "  " );	
      buffer.append( charArray );		//添加字符数组类型的值
      buffer.append( "  " );
      buffer.append( charArray, 0, 3 ); 	//添加字符数组中的子字符串
      buffer.append( "  " );
      buffer.append( booleanValue );		//添加boolean类型的值
      buffer.append( "  " );
      buffer.append( characterValue );		//添加char类型的值
      buffer.append( "  " );
      buffer.append( integerValue );		//添加int类型的值
      buffer.append( "  " );
      buffer.append( longValue );		//添加long类型的值
      buffer.append( "  " );
      buffer.append( floatValue );		//添加float类型的值
      buffer.append( "  " );
      buffer.append( doubleValue );		//添加double类型的值
      buffer.append( "  " );
      buffer.append( lastBuffer );			//添加StringBuffer类型的值
      JOptionPane.showMessageDialog( null, 
         "buffer = " + buffer.toString(), "StringBuffer类的append方法的使用", 
         JOptionPane.INFORMATION_MESSAGE );
      System.exit( 0 );
   }
}