summaryrefslogtreecommitdiff
path: root/base/src/main/java/bjc/utils/math/NumberUtils.java
diff options
context:
space:
mode:
authorbjculkin <bjculkin@mix.wvu.edu>2018-02-12 22:19:02 -0500
committerbjculkin <bjculkin@mix.wvu.edu>2018-02-12 22:19:02 -0500
commit32f5da54c628408c96db09d279f3a7ef44b3bd19 (patch)
treeef56d04518b8791409ed65db58c304b74b23a01b /base/src/main/java/bjc/utils/math/NumberUtils.java
parent49cd96c4c5bbb883c0c5c10d7916ad2e93ff2df0 (diff)
Update
Diffstat (limited to 'base/src/main/java/bjc/utils/math/NumberUtils.java')
-rw-r--r--base/src/main/java/bjc/utils/math/NumberUtils.java106
1 files changed, 56 insertions, 50 deletions
diff --git a/base/src/main/java/bjc/utils/math/NumberUtils.java b/base/src/main/java/bjc/utils/math/NumberUtils.java
index 9391040..ed58bb8 100644
--- a/base/src/main/java/bjc/utils/math/NumberUtils.java
+++ b/base/src/main/java/bjc/utils/math/NumberUtils.java
@@ -27,7 +27,7 @@ public class NumberUtils {
}
if(currNumber >= 1000) {
- int numM = (int)(currNumber / 1000);
+ int numM = (int) (currNumber / 1000);
currNumber = currNumber % 1000;
for(int i = 0; i < numM; i++) {
@@ -54,7 +54,7 @@ public class NumberUtils {
}
if(currNumber >= 100) {
- int numC = (int)(currNumber / 100);
+ int numC = (int) (currNumber / 100);
currNumber = currNumber % 100;
for(int i = 0; i < numC; i++) {
@@ -81,7 +81,7 @@ public class NumberUtils {
}
if(currNumber >= 10) {
- int numX = (int)(currNumber / 10);
+ int numX = (int) (currNumber / 10);
currNumber = currNumber % 10;
for(int i = 0; i < numX; i++) {
@@ -108,7 +108,7 @@ public class NumberUtils {
}
if(currNumber >= 1) {
- int numI = (int)(currNumber / 1);
+ int numI = (int) (currNumber / 1);
currNumber = currNumber % 1;
for(int i = 0; i < numI; i++) {
@@ -118,25 +118,23 @@ public class NumberUtils {
return work.toString();
}
-
+
public static String toCardinal(long number) {
return toCardinal(number, null);
}
- private static String[] cardinals = new String[] {
- "zero", "one", "two", "three", "four", "five", "six", "seven",
- "eight", "nine", "ten", "eleven", "twelve", "thirteen",
- "fourteen", "fifteen", "sixteen", "seventeen", "eighteen",
- "nineteen", "twenty",
- };
+ private static String[] cardinals = new String[] { "zero", "one", "two", "three", "four", "five", "six",
+ "seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen", "fourteen", "fifteen",
+ "sixteen", "seventeen", "eighteen", "nineteen", "twenty", };
public static class CardinalState {
- public final Map<Long, String> customNumbers;
- public final Map<LongPredicate, BiFunction<Long, CardinalState, String>> customScales;
+ public final Map<Long, String> customNumbers;
+ public final Map<LongPredicate, BiFunction<Long, CardinalState, String>> customScales;
- public CardinalState(Map<Long, String> customNumbers, Map<LongPredicate, BiFunction<Long, CardinalState, String>> customScales) {
+ public CardinalState(Map<Long, String> customNumbers,
+ Map<LongPredicate, BiFunction<Long, CardinalState, String>> customScales) {
this.customNumbers = customNumbers;
- this.customScales = customScales;
+ this.customScales = customScales;
}
public String handleCustom(long number) {
@@ -144,7 +142,8 @@ public class NumberUtils {
return customNumbers.get(number);
}
- for(Entry<LongPredicate, BiFunction<Long, CardinalState, String>> ent : customScales.entrySet()) {
+ for(Entry<LongPredicate, BiFunction<Long, CardinalState, String>> ent : customScales
+ .entrySet()) {
if(ent.getKey().test(number)) {
return ent.getValue().apply(number, this);
}
@@ -163,11 +162,11 @@ public class NumberUtils {
if(number < 0) return "negative " + toCardinal(number * -1, custom);
- if(number <= 20) return cardinals[(int)number];
+ if(number <= 20) return cardinals[(int) number];
if(number < 100) {
if(number % 10 == 0) {
- switch((int)number) {
+ switch((int) number) {
case 30:
return "thirty";
case 40:
@@ -183,51 +182,52 @@ public class NumberUtils {
case 90:
return "ninety";
default:
- /*
+ /*
* Shouldn't happen.
*/
- assert(false);
+ assert (false);
}
}
- long numTens = (long)(number / 10);
+ long numTens = (long) (number / 10);
long numOnes = number % 10;
return toCardinal(numTens, custom) + "-" + toCardinal(numOnes, custom);
}
if(number < 1000) {
- long numHundreds = (long)(number / 100);
- long rest = number % 100;
+ long numHundreds = (long) (number / 100);
+ long rest = number % 100;
return toCardinal(numHundreds, custom) + " hundred and " + toCardinal(rest, custom);
}
- long MILLION = (long)(Math.pow(10, 6));
+ long MILLION = (long) (Math.pow(10, 6));
if(number < MILLION) {
- long numThousands = (long)(number / 1000);
- long rest = number % 1000;
+ long numThousands = (long) (number / 1000);
+ long rest = number % 1000;
return toCardinal(numThousands, custom) + " thousand, " + toCardinal(rest, custom);
}
- long BILLION = (long)(Math.pow(10, 9));
+ long BILLION = (long) (Math.pow(10, 9));
if(number < BILLION) {
- long numMillions = (long)(number / MILLION);
- long rest = number % MILLION;
+ long numMillions = (long) (number / MILLION);
+ long rest = number % MILLION;
return toCardinal(numMillions, custom) + " million, " + toCardinal(rest, custom);
}
- long TRILLION = (long)(Math.pow(10, 12));
+ long TRILLION = (long) (Math.pow(10, 12));
if(number < TRILLION) {
- long numBillions = (long)(number / BILLION);
- long rest = number % BILLION;
+ long numBillions = (long) (number / BILLION);
+ long rest = number % BILLION;
return toCardinal(numBillions, custom) + " billion, " + toCardinal(rest, custom);
}
- throw new IllegalArgumentException("Numbers greater than or equal to 1 trillion are not supported yet.");
+ throw new IllegalArgumentException(
+ "Numbers greater than or equal to 1 trillion are not supported yet.");
}
public static String toOrdinal(long number) {
@@ -236,7 +236,7 @@ public class NumberUtils {
}
if(number < 20) {
- switch((int)number) {
+ switch((int) number) {
case 0:
return "zeroth";
case 1:
@@ -281,13 +281,13 @@ public class NumberUtils {
/*
* Shouldn't happen.
*/
- assert(false);
+ assert (false);
}
}
if(number < 100) {
if(number % 10 == 0) {
- switch((int)number) {
+ switch((int) number) {
case 20:
return "twentieth";
case 30:
@@ -304,6 +304,8 @@ public class NumberUtils {
return "eightieth";
case 90:
return "ninetieth";
+ default:
+ throw new IllegalArgumentException(String.format("Illegal number %d", number));
}
}
@@ -311,15 +313,15 @@ public class NumberUtils {
return toCardinal(number - numPostfix) + "-" + toOrdinal(numPostfix);
}
- long procNum = number % 100;
- long tens = (long)(procNum / 10);
- long ones = procNum % 10;
+ long procNum = number % 100;
+ long tens = (long) (procNum / 10);
+ long ones = procNum % 10;
if(tens == 1) {
return Long.toString(number) + "th";
- }
+ }
- switch((int)ones) {
+ switch((int) ones) {
case 1:
return Long.toString(number) + "st";
case 2:
@@ -330,33 +332,36 @@ public class NumberUtils {
return Long.toString(number) + "th";
}
}
-
+
private static char[] radixChars = new char[62];
static {
int idx = 0;
for(char i = 0; i < 10; i++) {
- radixChars[idx] = (char)('0' + i);
+ radixChars[idx] = (char) ('0' + i);
idx += 1;
}
for(char i = 0; i < 26; i++) {
- radixChars[idx] = (char)('A' + i);
+ radixChars[idx] = (char) ('A' + i);
idx += 1;
}
for(char i = 0; i < 26; i++) {
- radixChars[idx] = (char)('a' + i);
+ radixChars[idx] = (char) ('a' + i);
idx += 1;
}
}
- public static String toCommaString(long val, int mincols, char padchar, int commaInterval, char commaChar, boolean signed, int radix) {
+ public static String toCommaString(long val, int mincols, char padchar, int commaInterval, char commaChar,
+ boolean signed, int radix) {
if(radix > radixChars.length) {
- throw new IllegalArgumentException(String.format("Radix %d is larger than largest supported radix %d", radix, radixChars.length));
+ throw new IllegalArgumentException(
+ String.format("Radix %d is larger than largest supported radix %d", radix,
+ radixChars.length));
}
StringBuilder work = new StringBuilder();
@@ -376,15 +381,16 @@ public class NumberUtils {
while(currVal != 0) {
valCounter += 1;
- int radDigit = (int)(currVal % radix);
+ int radDigit = (int) (currVal % radix);
work.append(radixChars[radDigit]);
- currVal = (long)(currVal / radix);
+ currVal = (long) (currVal / radix);
if(commaInterval != 0 && valCounter % commaInterval == 0) work.append(commaChar);
}
}
- if(isNeg) work.append("-");
+ if(isNeg)
+ work.append("-");
else if(signed) work.append("+");
work.reverse();