Following example shows how to convert camel case string to a displayable (space separated) string. This also works for Java identifiers (method, field, class names)
package com.logicbig.example;
import java.lang.reflect.Method;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Arrays;
public class DisplayableStrings {
//to split camel case
public static String[] splitByCapitalLetters(String input) {
return input.split("(?=\\p{Upper})");
}
public static String fromJavaIdentifierToDisplayableString(String input) {
String rv = "";
for (String s : splitByCapitalLetters(input)) {
rv += s + " ";
}
rv = rv.trim();
if (Character.isLowerCase(rv.charAt(0))) {
rv = Character.toUpperCase(rv.charAt(0)) + rv.substring(1, rv.length());
}
return rv;
}
public static void main(String[] args) {
String s = fromJavaIdentifierToDisplayableString(BigDecimal.class.getSimpleName());
System.out.println(s);
Arrays.stream(ArrayList.class.getDeclaredMethods()).map(Method::getName)
.forEach(f -> {
System.out.println(f + " -> " + fromJavaIdentifierToDisplayableString(f));
});
}
}
Big Decimal add -> Add add -> Add add -> Add remove -> Remove remove -> Remove get -> Get clone -> Clone indexOf -> Index Of clear -> Clear isEmpty -> Is Empty lastIndexOf -> Last Index Of contains -> Contains replaceAll -> Replace All size -> Size subList -> Sub List toArray -> To Array toArray -> To Array iterator -> Iterator spliterator -> Spliterator addAll -> Add All addAll -> Add All set -> Set access$000 -> Access$000 readObject -> Read Object writeObject -> Write Object forEach -> For Each newCapacity -> New Capacity ensureCapacity -> Ensure Capacity trimToSize -> Trim To Size hugeCapacity -> Huge Capacity retainAll -> Retain All removeAll -> Remove All removeIf -> Remove If removeIf -> Remove If sort -> Sort listIterator -> List Iterator listIterator -> List Iterator removeRange -> Remove Range rangeCheckForAdd -> Range Check For Add outOfBoundsMsg -> Out Of Bounds Msg outOfBoundsMsg -> Out Of Bounds Msg elementData -> Element Data grow -> Grow grow -> Grow elementAt -> Element At fastRemove -> Fast Remove shiftTailOverGap -> Shift Tail Over Gap batchRemove -> Batch Remove nBits -> N Bits setBit -> Set Bit isClear -> Is Clear checkInvariants -> Check Invariants
