String-2
public String doubleChar(String str) {
String str1 = "";
for (int i = 0; i < str.length(); i++) {
str1 = str1 + str.charAt(i) + str.charAt(i);
}
return str1;
}public int countHi(String str) {
int count = 0;
for (int i = 0; i < str.length() - 1; i++) {
if (str.substring(i, i + 2).equals("hi")) {
count++;
}
}
return count;
}public boolean catDog(String str) {
int catCount = 0;
int dogCount = 0;
for (int i = 0; i < str.length() - 2; i++) {
if (str.substring(i, i + 3).equals("cat")) {
catCount++;
}
if (str.substring(i, i + 3).equals("dog")) {
dogCount++;
}
}
return catCount == dogCount;
}public int countCode(String str) {
int count = 0;
for (int i = 0; i < str.length() - 3; i++) {
if (str.substring(i, i + 2).equals("co") && str.substring(i + 3, i + 4).equals("e")) {
count++;
}
}
return count;
}public boolean endOther(String a, String b) {
a = a.toLowerCase();
b = b.toLowerCase();
if (a.length() <= b.length()) {
if (b.substring(b.length() - a.length(), b.length()).equals(a)) {
return true;
}
}
if (a.length() >= b.length()) {
if (a.substring(a.length() - b.length(), a.length()).equals(b)) {
return true;
}
}
return false;
}public boolean xyzThere(String str) {
for(int i = 0; i<str.length()-2; i++ ){
if(i==0 && str.substring(i, i+3).equals("xyz")){
return true;
}
if(i > 1 && str.substring(i, i+3).equals("xyz") && str.charAt(i-1) !='.'){
return true;
}
}
return false;
}public boolean bobThere(String str) {
for(int i = 0; i<str.length()-2; i++){
if(str.charAt(i) == 'b' && str.charAt(i+2) == 'b'){
return true;
}
}
return false;
}public boolean xyBalance(String str) {
if ((str.lastIndexOf("y") > str.lastIndexOf("x"))) {
return true;
}
if (str.indexOf("x") == str.indexOf("y")) {
return true;
}
return false;
}public String mixString(String a, String b) {
String result = "";
int shorterAb = Math.min(a.length(), b.length());
for (int i = 0; i < shorterAb; i++) {
result = result + a.charAt(i) + b.charAt(i);
}
if (a.length() >= b.length()) {
return result + a.substring(b.length(), a.length());
}
if (a.length() <= b.length()) {
return result + b.substring(a.length(), b.length());
}
return result;
}public String repeatEnd(String str, int n) {
String result = "";
for (int i = 0; i < n; i++) {
result = result + str.substring(str.length() - n, str.length());
}
return result;
}public String repeatFront(String str, int n) {
String result = "";
for (int i = 0; i < n; i++) {
result = result + str.substring(0, n - i);
}
return result;
}public String repeatSeparator(String word, String sep, int count) {
String result = "";
for(int i = 0; i<count; i++){
if(count == 1){
return word;
}
result = result + word+sep;
}
return result.substring(0, result.length()-sep.length());
}public boolean prefixAgain(String str, int n) {
String prefix = str.substring(0, n);
for (int i = 0; i < str.length() - n + 1; i++) {
if (i >= n && prefix.equals(str.substring(i, i + n))) {
return true;
}
}
return false;
}public boolean xyzMiddle(String str) {
int front = 0;
int end = 0;
int res = 0;
for (int i = 0; i < str.length() - 2; i++) {
if (str.length() >= 3 && str.substring(i, i + 3).equals("xyz")) {
front = str.substring(0, i).length();
end = str.substring(i + 3, str.length()).length();
res = front - end;
if (Math.abs(res) <= 1) {
return true;
}
}
}
return false;
}public String getSandwich(String str) {
for (int i = 0; i<str.length()-4; i++){
if(str.length()>=5 && str.substring(i, i+5).equals("bread")){
if(str.lastIndexOf("bread") != -1 && i+5 < str.lastIndexOf("bread")){
return str.substring(i+5, str.lastIndexOf("bread") );
}
}
}
return "";
}public boolean sameStarChar(String str) {
int countTrue = 0;
int countStar = 0;
for (int i = 1; i < str.length() - 1; i++) {
if (str.charAt(i) == '*' && str.charAt(i - 1) == str.charAt(i + 1)) {
countTrue++;
}
if (str.charAt(i) == '*') {
countStar++;
}
}
return countStar == countTrue;
}public String oneTwo(String str) {
String res = "";
for (int i = 0; i < str.length() - 2; i++) {
if (i % 3 == 0) {
res = res + str.substring(i + 1, i + 3) + str.charAt(i);
}
}
return res;
}public String zipZap(String str) {
String result = "";
if (str.length() >= 3) {
for (int i = 0; i < str.length() - 2; i++) {
result = result + str.charAt(i);
if (str.charAt(i) == 'z' && str.charAt(i + 2) == 'p') {
result = result + "p";
i += 2;
}
}
if (result.equals(str.substring(0, str.length() - 2))) {
return str;
}
return result;
}
return str;
}public String starOut(String str) {
String result = "";
result = str.replaceAll(".\\\\*+.", "");
result = result.replaceAll(".\\\\*", "");
result = result.replaceAll("\\\\*.", "");
result = result.replaceAll("\\\\*", "");
return result;
}public String plusOut(String str, String word) {
String res = "";
int wordLen = word.length();
if (str.indexOf(word) != -1) {
for (int i = 0; i < str.length() - wordLen + 1; i++) {
if (!str.substring(i, i + wordLen).equals(word)) {
res += "+";
}
if (str.substring(i, i + wordLen).equals(word)) {
res = res.substring(0, res.length()) + word;
if (str.substring(i + wordLen, str.length()).indexOf(word) != -1) {
i += wordLen - 1;
}
}
}
return res;
}
return str;
}public String wordEnds(String str, String word) {
String res = "";
if (str.equals(word + word)) {
return "" + str.charAt(0) + str.charAt(str.length() - 1);
}
if (str.indexOf(word) != -1 && str.length() > word.length()) {
for (int i = 0; i < str.length() - word.length() + 1; i++) {
if (i == 0) {
if (str.substring(i, word.length()).equals(word)) {
if (!str.substring(i + word.length(), i + (2 * word.length())).equals(word)) {
res += str.charAt(i + word.length());
}
}
}
if (i > 0) {
if (str.substring(i, i + word.length()).equals(word)) {
res = res.substring(0, res.length()) + str.charAt(i - 1);
if (str.length() > i + word.length()) {
res = res.substring(0, res.length()) + str.charAt(i + word.length());
}
}
}
}
return res;
}
return "";
}Last updated