package string;
class StringLib {
public String reverseWords(String str) {
String finalStr = "";
String tempStr = "";
for (int i = 0; i < str.length(); i++) {
char c = str.charAt(i);
if (c == ' ') {
finalStr = " " + tempStr + finalStr;
tempStr = "";
} else {
tempStr = tempStr + c;
}
}
finalStr = tempStr + finalStr;
return finalStr;
}
public String reverseWordsStringBuilder(String str) {
StringBuilder finalStr = new StringBuilder();
StringBuilder tempStr = new StringBuilder();
for (int i = 0; i < str.length(); i++) {
char c = str.charAt(i);
if (c == ' ') {
finalStr.insert(0, tempStr).insert(0, " ");
tempStr.setLength(0);
} else {
tempStr.append(c);
}
}
finalStr.insert(0, tempStr);
return finalStr.toString();
}
public String reverseWordsUsingReverse(String str) {
str = reverseString(str);
str = reverseIndividualWord(str);
return str;
}
public String reverseIndividualWord(String str) {
String finalStr = "";
String tempStr = "";
for (int i = 0; i < str.length(); i++) {
char c = str.charAt(i);
if (c == ' ') {
finalStr = finalStr + tempStr + " ";
tempStr = "";
} else {
tempStr = c + tempStr;
}
}
finalStr = finalStr + tempStr;
return finalStr;
}
public String reverseString(String str) {
String s = "";
for (int i = 0; i < str.length(); i++) {
s = str.charAt(i) + s;
}
return s;
}
}
public class StringApp {
public static void main(String[] args) {
StringLib obj = new StringLib();
String str = "coding simplified nice";
System.out.println(obj.reverseWords(str));
System.out.println(obj.reverseWordsStringBuilder(str));
System.out.println(obj.reverseWordsUsingReverse(str));
}
}
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