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/**
* ¶ÔdoubleÊý¾Ý½øÐÐÈ¡¾«¶È.
* @param value doubleÊý¾Ý.
* @param scale ¾«¶ÈλÊý(±£ÁôµÄСÊýλÊý).
* @param roundingMode ¾«¶Èȡֵ·½Ê½.
* @return ¾«¶È¼ÆËãºóµÄÊý¾Ý.
*/
public static double round(double value, int scale,
int roundingMode) {
BigDecimal bd = new BigDecimal(value);
bd = bd.setScale(scale, roundingMode);
double d = bd.doubleValue();
bd = null;
return d;
}
/**
* double Ïà¼Ó
* @param d1
* @param d2
* @return
*/
public double sum(double d1,double d2){
BigDecimal bd1 = new BigDecimal(Double.toString(d1));
BigDecimal bd2 = new BigDecimal(Double.toString(d2));
return bd1.add(bd2).doubleValue();
}
/**
* double Ïà¼õ
* @param d1
* @param d2
* @return
*/
public double sub(double d1,double d2
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public class NodeBean implements Serializable
{
private Object data; //ÔªËØ±¾Éí
private NodeBean next; //ÏÂÒ»¸ö½Úµã
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import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
public class j5_13 extends Applet implements ActionListener
{
Panel p=new Panel();//н¨²¼¾Ö
Label welcome,la1,li1,la2,li2,lresult;//Ìáʾ±êÇ©,·ûºÅ±êÇ©ÒÔ¼°¼ÆËã½á¹ûµÄ±êÇ©
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/**
* @(#)ReverseString.java
*
* ReverseString application
*
* @author
* @version 1.00 2010/4/20
*/
import java.util.*;
import java.io.*;
public class ReverseString {
public static void main(String[] args) throws IOException{
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