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indexOf + substring in Java


indexOf + substring in Java

By : Jesse Simmons
Date : October 23 2020, 08:10 PM
help you fix your problem I am stuck concerning an exercise, the goal is to enter a name and recuperate the value from name. example (vanitoglo)
code :
Scanner input = new Scanner();

String nameEntry = null;   //  enter the name
int vanIndex = 0;     //  index of van
boolean wordPresent = false;  //  word search all over

System.out.print("Enter your name :");
nameEntry = input.next();

vanIndex = nameEntry.indexOf("van");

if(vanIndex > 0){
    wordPresent = true;
}

if(wordPresent){
//do whatever
}


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Java subString and indexOf

Java subString and indexOf


By : Slocki
Date : March 29 2020, 07:55 AM
this one helps. The first value of string3 is an empty string.
Now p is the index of "ice" in string1 occurring after the 8th index. So p is 13 (you can count it yourself).
code :
"The ice cold i" // note the 14th index is not included
"The ice cold i" + "PHONE" or simply "The ice cold iPHONE"
Separating words from a string using indexOf & substring methods in Java

Separating words from a string using indexOf & substring methods in Java


By : Vivek Chandra
Date : March 29 2020, 07:55 AM
With these it helps Replace while(index>=0) with while(!word.isEmpty()) and get rid of index
Java String, indexof and substring to get a date parsed

Java String, indexof and substring to get a date parsed


By : Nathan Patrick
Date : March 29 2020, 07:55 AM
help you fix your problem I found the answer here Parse String to Date with Different Format in Java , modified the date formats as per your need
MMMM for complete month in String
code :
SimpleDateFormat fromUser = new SimpleDateFormat("MM/dd/yyyy");
SimpleDateFormat myFormat = new SimpleDateFormat("MMMM dd, yyyy");

try {    
    String reformattedStr = myFormat.format(fromUser.parse(inputString));
} catch (ParseException e) {
    e.printStackTrace();
}
How to Extract Multiple words from a string using IndexOf and substring Java?

How to Extract Multiple words from a string using IndexOf and substring Java?


By : Juan Martín Ratti
Date : March 29 2020, 07:55 AM
With these it helps Here is how I would refactor your while loop to correctly extract, print, and count all words in a sentence:
code :
while (scan.hasNext()) {
    int wordCount = 0;
    int numChars = 0;
    fileRead = scan.nextLine();

    // Note: I add an extra space at the end of the input sentence
    //       so that the while loop will pick up on the last word.
    if (fileRead.charAt(fileRead.length() - 1) == '.') {
        fileRead = fileRead.substring(0, fileRead.length() - 1) + " ";
    }
    else {
        fileRead = fileRead + " ";
    }
    int index = fileRead.indexOf(" ");
    do {
        String strA = fileRead.substring(0, index);
        System.out.print(strA + " ");
        fileRead = fileRead.substring(index+1, fileRead.length());
        index = fileRead.indexOf(" ");
        wordCount++;
        numChars += strA.length();
    } while (index != -1);

    // here is your computation.
    if (wordCount > 0) {
        double result = (double)numChars / wordCount;  // average length of words
        result = Math.pow(result, 2.0);                // square the average
        result = wordCount * result;                   // multiply by number of words
        System.out.println(result);                    // output this number
    }
}
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Would Java indexOf (brute force method) be more practical for me or some other substring algorithm?

Would Java indexOf (brute force method) be more practical for me or some other substring algorithm?


By : Michael Stilmant
Date : March 29 2020, 07:55 AM
I wish this helpful for you You can replace the hashtable with a Trie.
Split the line of text into words using white space to separate words. Then check if the word is in the Trie. If it is in the Trie, update a counter associated with the word. Ideally, the counter would be integrated into the Trie.
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