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BigDecimal switch

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This commit is contained in:
nora 2021-01-10 21:39:38 +01:00
parent 31a219b3e2
commit 94a169b421
6 changed files with 144 additions and 65 deletions
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51
src/main/java/LargeFormatter.java
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@ -1,16 +1,22 @@
import java.math.BigDecimal;
public class LargeFormatter {
private static final String[] suffixes = {"", "k", "M", "B", "T", "q", "Q", "s", "S", "O", "N"};
//private static final String[] suffixes = {"", "k"}; //for large number testing
private static final BigDecimal _999 = BigDecimal.valueOf(999);
private static final BigDecimal THOUSAND = BigDecimal.valueOf(100);
private static final BigDecimal TEN = BigDecimal.TEN;
//input: 10 230 000 -> 10.23M
public String formatBigNumber(double number) {
public String formatDouble(double number) {
int suffixSize = 0;
boolean scientific = false;
while (number > 999) {
if(suffixSize == suffixes.length - 1){
if (suffixSize == suffixes.length - 1) {
scientific = true;
break;
}
@ -19,15 +25,50 @@ public class LargeFormatter {
number /= 1000;
}
if(scientific){
if (scientific) {
int exp = 3 * suffixSize;
while(number >= 10){
while (number >= 10) {
exp++;
number /= 10;
}
return String.format("%.2fE%d", number, exp);
} else {
if(Math.floor(number) == number){
if (Math.floor(number) == number) {
return String.format("%.0f%s", number, suffixes[suffixSize]);
} else {
return String.format("%.2f%s", number, suffixes[suffixSize]);
}
}
}
public String formatBigNumber(BigDecimal number) {
if(number == null){
System.err.println("NUMBER IS NULL ");
return "";
}
int suffixSize = 0;
boolean scientific = false;
while (number.compareTo(_999) > 0) {
if (suffixSize == suffixes.length - 1) {
scientific = true;
break;
}
suffixSize++;
number = number.divide(THOUSAND);
}
if (scientific) {
int exp = 3 * suffixSize;
while (number.compareTo(TEN) >= 0) {
exp++;
number = number.divide(TEN);
}
return String.format("%.2fE%d", number, exp);
} else {
if (false) { //TODO implement better solution
return String.format("%.0f%s", number, suffixes[suffixSize]);
} else {
return String.format("%.2f%s", number, suffixes[suffixSize]);