如何将String与double数据的互换

package test2;
import java.text.DecimalFormat;
public class testStringAndDouble {
/**
* @param args
*/
public static void main(String[] args) {
// TODO 自动生成方法存根
String s = "10,000,001.4899";
double d = 10003002.4899;
int de=100;//精确度。

testStringAndDouble.StringToDouble(s);
testStringAndDouble.DoubleToString(d,de);
}
public static double StringToDouble(String s) {
String[] ss = s.split(",");
StringBuffer sb = new StringBuffer();
for (int i = 0; i < ss.length; i++) {
sb.append(ss[i]);
// System.out.println(ss[i]);
}
String sd = sb.toString();
System.out.println(sd);
double d = Double.parseDouble(sd);
// System.out.println(d);
DecimalFormat df = new DecimalFormat("#.00");// 四舍五入
String sdOk = df.format(d);
double dOk = Double.parseDouble(sdOk);
System.out.println(dOk);
return dOk;
}
public static String DoubleToString(double d,int de) { long integer = (long)d;//整数部分。

long decimal = (long)((d - integer)*de);//小数部分。

String sInt = integer+"";
String sDe = String.valueOf(decimal);
char[] c = sInt.toCharArray();
StringBuffer sb = new StringBuffer();
int j=0;
char temp;
for(int k = 0;k<c.length/2;k++){
temp = c[c.length-1-k];
c[c.length-1-k] = c[k];
c[k] = temp;
}
for(int i=0;i<c.length;i++){
sb.append(c[i]);
j++;
if (j==3){
sb.append(',');
j=0;
}
}
String ss = sb.toString();
char[] cs = ss.toCharArray();
for(int k = 0;k<cs.length/2;k++){
temp = cs[cs.length-1-k];
cs[cs.length-1-k] = cs[k];
cs[k] = temp;
}
StringBuffer sbOk = new StringBuffer();
for(int a = 0;a<cs.length;a++){
sbOk.append(cs[a]);
}
System.out.println(cs);
sbOk.append('.');
sbOk.append(sDe);
String sOk = sbOk.toString();
System.out.println(sOk);
return sOk;
}
}。