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BigDecimal(double)´´½¨Ò»¸ö¾ßÓвÎÊýËùÖ¸¶¨Ë«¾«¶ÈÖµµÄ¶ÔÏó¡£
BigDecimal(long)´´½¨Ò»¸ö¾ßÓвÎÊýËùÖ¸¶¨³¤ÕûÊýÖµµÄ¶ÔÏó¡£
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add(BigDecimal)BigDecimal¶ÔÏóÖеÄÖµÏà¼Ó£¬È»ºó·µ»ØÕâ¸ö¶ÔÏó¡£
subtract(BigDecimal)BigDecimal¶ÔÏóÖеÄÖµÏà¼õ£¬È»ºó·µ»ØÕâ¸ö¶ÔÏó¡£
multiply(BigDecimal)BigDecimal¶ÔÏóÖеÄÖµÏà³Ë£¬È»ºó·µ»ØÕâ¸ö¶ÔÏó¡£
divide(BigDecimal)BigDecimal¶ÔÏóÖеÄÖµÏà³ý£¬È»ºó·µ»ØÕâ¸ö¶ÔÏó¡£
toString()½«BigDecimal¶ÔÏóµÄÊýֵת»»³É×Ö·û´®¡£
doubleValue()½«BigDecimal¶ÔÏóÖеÄÖµÒÔË«¾«¶ÈÊý·µ»Ø¡£
floatValue()½«BigDecimal¶ÔÏóÖеÄÖµÒÔµ¥¾«¶ÈÊý·µ»Ø¡£
longValue()½«BigDecimal¶ÔÏóÖеÄÖµÒÔ³¤ÕûÊý·µ»Ø¡£
intValue()½«BigDecimal¶ÔÏóÖеÄÖµÒÔÕûÊý·µ»Ø¡£
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//ÍêÕû³ÌÐòÀý×ÓÔÚ±¾ÊéÅäÌ××ÊԴĿ¼Ch5ÖÐÃûΪBigDecimalTestApp.java
//´´½¨BigDecimal¶ÔÏó
BigDecimal bigNumber = new BigDecimal("89.1234567890123456789");
BigDecimal bigRate = new BigDecimal(1000);
BigDecimal bigResult = new BigDecimal(); //¶ÔÏóbigResultµÄֵΪ0.0
//¶ÔbigNumberµÄÖµ³ËÒÔ1000£¬½á¹û ¸³ÓèbigResult
bigResult = bigNumber.multiply(bigRate);
System.out.println(bigResult.toString());
//»òÕßSystem.out.println(bigResult);
//ÏÔʾ½á¹û£º89123.4567890123456789000
//ÒÔË«¾«¶ÈÊý·µ»ØbigNumberÖеÄÖµ
double dData = bigNumber.doubleValue();
System.out.println(dData); //½á¹û


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static{
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package barchartdemo1;
import java.awt.Font;
import java.io.FileOutputStream;
import java.io.IOException;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.Numbe ......
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