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I hope you are fine.
I am searching for a simple way to compare two Strings and print out the words which are unique between the two, for example I have :
String one = edittext1.getText().toString();
String two = editText2.getText().toString();
Then the output should be what is the words that exists in edittext1 and not exist in edittext2.
if it's only words you can split the strings to string[] that each cell will contain 1 word only and then compare those words. Goes as follows:
String one = "this is first text example";
String two = "this is next text example";
String[] oneVals = one.split("\\ ");
String[] twoVals = two.split("\\ ");
int i = oneVals.length;
if(oneVals.length != twoVals.length)
{
// determine what to do
}
String wordsNotMatching = "";
for(int j=0; j<i; j++)
{
if((!oneVals[j].equals(twoVals[j])))
wordsNotMatching += oneVals[j] + " ";
}
// wordNotMatching will contain all different words.
Related
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I am not sure how to approach this problem. I've seen people using arrays but after trying it, it only worked for the whole string and not each words individually.
Thanks for the help!
You can use the split method to split the string into multiple words, saved in a String array. Then, get the first and last letter using the charAt method, and then concatenate them in the correct order to get the modified word.
String a = "This is a string with multiple words";
String[] arr = a.split(" "); //splits string into an array of strings, by separating with spaces
for (int i = 0; i < arr.length; i++) //looping through each word
{
if (arr[i].length() == 1) //don't change word if it only has 1 letter
{
System.out.print(arr[i] + " ");
continue;
}
//using charAt to obtain first and last letter of each word
char firstLetter = arr[i].charAt(0);
char lastLetter = arr[i].charAt(arr[i].length()-1);
String middle = arr[i].substring(1, arr[i].length()-1); //all letters of word except first and last
arr[i] = lastLetter + middle + firstLetter; //concatenating together to create new word
System.out.print(arr[i] + " "); //printing each word after switching letters
}
You seem like a beginner to Java, so I highly recommend you read the Java documentation on the String class and its methods, as Java has some pretty thorough and relatively easy to understand documentation.
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My program will take a string from user via a text field
when he presses the button the string should be formatted as shown in the example
An Example will help you understand better
If String Entered is "hello"
Output should be
hello
elloh
llohe
lohel
ohell
hello
The first character must shift to last until the initial word is formed again.
This must work for any length of string
Displaystr =newStr.charAt(newStr.length() - 1) + newStr.substring(0, newStr.length - 1);
I tried this code but It didn't help
Edited - Please don't put question on hold now.
try this:
public class Main {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
String text = sc.nextLine();
System.out.println(text);
for(int j=0;j<text.length();j++) {
char firstLetter = text.charAt(0); //get the first letter
text = text.substring(1); //remove the first letter from the input string
text = text + firstLetter;
System.out.println(text);
}
}
}
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I am trying write a program that accept an input and present the input with every 5th character replaced with X (count spaces also).
For example:
input: "hello my name is mario"
outpu: "hellX my Xame Xi maXio"
I only manage to replace specific letters, e.g every "m" letter.
Any help?
If you don't care about which character is at each fifth position you could use a regex.
String input = "hello my name is mario";
String output = input.replaceAll("(....).", "$1X");
System.out.printf("input : %s%noutput: %s%n", input, output);
output
input : hello my name is mario
output: hellX my Xame Xs maXio
Here is the code for you:
String test = "hello my name is mario";
String result = "";
int c = 1;
for (int i = 0; i < test.length(); i++) {
if (c++==5) {
result += "X";
c = 1;
} else {
result += test.charAt(i);
}
}
System.out.println("result = " + result);
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So I am trying to prompt the user to enter any words into a string. Then I want to prompt them to count the number of occurrences for whatever letter they want to count. So if they enter words in a string like "this is a test" and they search "t" for example, the return would be 3 t's in the string "this is a test". I am a little confused as to where to go from here...
BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
String inputValue;
String s = "";
System.out.print("Enter a string of words or type done to exit: ");
inputValue = input.readLine();
System.out.print("Which letter would you like to count: ");
s = input.readLine();
int counter = 0;
I am thinking about maybe doing a for loop and do something like counter++.
Answer provided by Jean above is correct but I would like use a different method to calculate number of occurrence of a character in a String.
String string = "this is a testing string";
int count = string.length() - string.replaceAll("t", "").length();
Or
int counter = string.split("t").length - 1;
You would need to escape meta characters if you are to check character like $.
Using Apache commons-lang you could simply do
int counter = StringUtils.countMatches(s, intputValue);
But if you really want to code it, then you could use
public int count(String fullString, char valueToCount)
{
int count = 0;
for (int i=0; i < fullString.length(); i++)
{
if (fullString.charAt(i) == valueToCount)
count++;
}
return count;
}
Another solution would consist of replacing everything in your string except the input char and return the length of the trimmed string.
return s.replaceAll("[^" + inputValue + "]", "").length();
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I have a String with some text, f.e.
"Thisisalongwordtest and I want tocutthelongword in pieces"
Now I want to cut the to longs word in 2 pieces with a blank. The word should be cut if it's longer than 10 characters.
The result should be:
"Thisisalon gwordtest and I want tocutthelo ngword in pieces"
How can I achieve this efficiently?
are you looking for this? or I misunderstood the question?
String newString = oldStr.replaceAll("\\w{10}","$0 "))
with your example, the newString is:
Thisisalon gwordtest and I want tocutthelo ngword in pieces
Edit for Pshemo's good comment
to avoid to add space after words with exact 10 chars:
str.replaceAll("\\w{10}(?=\\w)","$0 "));
.replaceAll("(\\w{10})(?=\\w)", "$1 ")
Tested with:
test("abcde fghij klmno pqrst");
test("abcdefghijklmnopqrst");
test("abcdefghijklmnopqrstuv");
test("abcdefghij klmnopqrstuv");
test("abcdefghij klmnopqrst uv");
separate text into words. (by space)
cut long words and replace source word with new words
assemble text again
Note, that this approach will kill multiple-spaces.
(?=\w{10,}\s)(\w{10})
Should be replaced by
"\1 "
you can use replace function.
If it has number or special characters
(?=\S{10,}\s)(\S{10})
can be used.
This is the code i wrote check it once.....
public class TakingInput {
public static void main(String[] args) {
String s="Thisisalongwordtest and I want tocutthelongword in pieces";
StringBuffer sb;
String arr[]=s.split(" ");
for(int i=0;i<arr.length;i++){
if(arr[i].length()>10){
sb=new StringBuffer(arr[i]);
sb.insert(10," ");
arr[i]=new String(sb);
}
}
for(String ss: arr){
System.out.println(ss);//o/p: "Thisisalon gwordtest and I want tocutthelo ngword in pieces"
}
}
}
This code will do exactly what you want.
First create a method that splits a String if its longer than 10 chars:
String splitIfLong(String s){
if(s.length() < 11) return s + " ";
else{
String result = "";
String temp = "";
for(int i = 0; i < s.length(); i++){
temp += s.charAt(i);
if(i == 9)
temp += " ";
result += temp;
temp = "";
}
return result + " ";
}
}
Then use Scanner to read every word in the sentence seperated by a white space" ":
String s = "Thisisalongwordtest and I want tocutthelongword in pieces";
String afterSplit = "";
Scanner in = new Scanner(s);
Then call the splitIfLong() method for every word in the sentence. And add what the method returns to a new String:
while(in.hasNext())
afterSplit += splitIfLong(in.next());
Now you can use the new String as you wish. If you call:
System.out.println(afterSplit);
it will print:
Thisisalon gwordtest and I want tocutthelo ngword in pieces
Hope this helps