added detect capital use java code

Author: GouravRusiya30

Java/detect-capital-use.java

@@ -0,0 +1,45 @@
+class Solution {
+ public boolean detectCapitalUse(String word) {
+ 
+ int upperCaseCount = 0;
+ int lowerCaseCount = 0;
+ 
+ int wordLen = word.length();
+ 
+ int i = 0;
+ int firstCharFlag = 0;
+ 
+ for(i=0 ; i<wordLen; i++){
+ int ch = word.charAt(i);
+ 
+ if(ch >= 'a' && ch <= 'z'){
+ lowerCaseCount++;
+ }
+ else if(ch >= 'A' && ch <= 'Z'){
+ upperCaseCount++;
+ 
+ if(i == 0){
+ firstCharFlag++;
+ }
+ }
+ }
+ 
+ 
+ if(i == wordLen){
+ if(lowerCaseCount == wordLen){
+ return true;
+ }
+ else if(upperCaseCount == wordLen){
+ return true;
+ }
+ else if(firstCharFlag == 1 && upperCaseCount == 1 && lowerCaseCount == (wordLen-1)){
+ return true;
+ }
+ else{
+ return false;
+ }
+ }
+ 
+ return false;
+ }
+}