Searching for Characters and Substrings in a String
The indexOf() methods search forward from the beginning of the string, and the lastIndexOf() methods search backward from the end of the string. If a character or substring is not found, indexOf() and lastIndexOf() return -1.
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How do you search for a specific text in a string in Java?
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In Java, you can use the indexOf() method of the String class to search for a word in a string. ...
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String sentence = "Hello, this is a sample sentence.";
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String word = "sample";
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int index = sentence.indexOf(word);
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if (index != -1) {
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System.out.println("The word '" + word + "' was found at index: " + index);
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} else {
How to search within a string?
Search for a character in a string - strchr & strrchr
The strchr function returns the first occurrence of a character within a string. The strrchr returns the last occurrence of a character within a string. They return a character pointer to the character found, or NULL pointer if the character is not found.
How do you check if a string contains something in Java?
The 'contains' method is a part of the Java String class. It's used to check if a certain sequence of characters is present within a string. This method returns a boolean value – 'true' if the sequence is found, and 'false' if not.
How to find occurrences of a word in a string in Java?
split(" "); String word = "or"; int occurrences = 0; for (int i=0; i<words. length; i++) if (words[i]. equals(word)) occurrences++; System. out.
Feb 16, 2023 · It searches the index of specified characters within a given string. It starts searching from the beginning to the end of the string (from left ...
Feb 14, 2012 · Use the String.indexOf(String str) method. From the JavaDoc: Returns the index within this string of the first occurrence of the specified ...
The contains() method provides the best way to check if String contains another substring or not. It reads well and returns boolean, which means you can ...
Searching characters in a String in Java. - Tutorialspoint
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Feb 26, 2020 · Searching characters in a String in Java. You can search for a particular letter in a string using the indexOf() method of the String class.
The indexOf() method returns the position of the first occurrence of specified character(s) in a string. Tip: Use the lastIndexOf method to return the position ...
May 23, 2023 · The java.lang.String.contains() method searches the sequence of characters in the given string. It returns true if the sequence of char ...
Mar 11, 2014 · In that case it is easier use int i = String.indexOf(inputSearch) and if (i != -1) , then look at line.charAt(i-1) and line.charAt(i+inputSearch ...
Duration: 5:18
Posted: Mar 29, 2018
Posted: Mar 29, 2018
This example shows how we can search a word within a String object using indexOf() method which returns a position index of a word within the string if found.
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