A small example of converting floating point numbers into RMB using Java

public class RMBConverter2 implements IRMBConverter {

private static final String [] RMB_NUMBER ={"zero","one","two","three","four","五","鲁","七","八","九"};

private static final String [] RMB_ATTR = {"元","十","百","千","万","十","百","千","100 million","十"," "Hundred", "Qian", "Wan", "Ten", "Hundred", "Qian"};

private static final String[] RMB_FEN = {"minutes","angle"};

@Override
public String change2RMB(double counts) {
StringBuffer rsBuf = new StringBuffer();

if (counts == 0L) {
return "zero";
}

if (counts < 0)
rsBuf.append("negative");

String zheng = strConverse(String.valueOf((long)counts));
String xiao = strConverse(String.valueOf(Math.round((counts - (long)counts)*100)));

char [] zhengArray = zheng.toCharArray();
char [] xiaoArray = xiao.toCharArray();

int zLength = zhengArray.length;
int xLength = xiaoArray.length;

List<String> zhengList = new ArrayList<String>();

for(int i =0; i< zLength; i++) {
int value = Integer.parseInt(""+zhengArray[i]);
if (value == 0 && (i != 4) && (i != 8) && i != 0) {
zhengList.add(RMB_NUMBER[value]);
}else {
zhengList.add(RMB_NUMBER[value]+
RMB_ATTR[i]);
}
}

for(int i = zhengList.size()-1; i>=0; i--) {
rsBuf.append(zhengList.get(i));
}

for(int i =0; i<xLength ;i++) {
int value = Integer.parseInt(""+xiaoArray[i]);
if (value > 0 ) {
rsBuf.append(RMB_NUMBER[value])
.append(RMB_FEN[xLength-i-1]);
}
}

String rs = rsBuf.toString();
rs = rs.replaceAll("zero+", "zero");
rs = rs.replaceAll("zero yuan", "yuan");
rs = rs.replaceAll("00,000", "10,000");
rs = rs.replaceAll("000 million", "100 million");
rs = rs.replaceAll("billion", "billion");
return rs;
}

private String strConverse(String str) {
StringBuffer rs = new StringBuffer();
char [] strArray = str.toCharArray();
for(int i = str.length()-1; i>=0; i--) {
rs.append(strArray[i]);
}
return rs.toString();
}

public static void main(String args []) {

RMBConverter2 c2 = new RMBConverter2();
System.out.println(c2.change2RMB(2001004.10));
System.out.println(c2.change2RMB(2000000.10));
System.out.println(c2.change2RMB(0L));
System.out.println(c2.change2RMB(1121000010000000L));
}

}