JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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How to find a string start with another string value in java?


Description:

Below example shows how to find whether a string value start with another string value. By using startsWith() method, you can get whether the string starts with the given string or not. Also this method tells that the string occurence at a specific position.


Code:
package com.myjava.string;

public class MyStrStartsWith {

    public static void main(String a[]){
    
        String str = "This is an example string.";
        System.out.println("Is this string starts with \"This\"? "
						+str.startsWith("This"));
        System.out.println("Is this string starts with \"is\"? "
						+str.startsWith("is"));
        System.out.println("Is this string starts with \"is\" after index 5? "
						+str.startsWith("is", 5));
    }
}

Example Output

Is this string starts with "This"? true
Is this string starts with "is"? false
Is this string starts with "is" after index 5? true

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When to use LinkedList or ArrayList?
Accessing elements are faster with ArrayList, because it is index based. But accessing is difficult with LinkedList. It is slow access. This is to access any element, you need to navigate through the elements one by one. But insertion and deletion is much faster with LinkedList, because if you know the node, just change the pointers before or after nodes. Insertion and deletion is slow with ArrayList, this is because, during these operations ArrayList need to adjust the indexes according to deletion or insetion if you are performing on middle indexes. Means, an ArrayList having 10 elements, if you are inserting at index 5, then you need to shift the indexes above 5 to one more.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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