JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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How to trim spaces in the given string in java?


Description:

Below example shows how to trim spaces in the given string. The trim() function removes all kind of space characters at both ends, means removes starting and trailing spaces. These space characters includes normal space, enter, new line, tab, etc.


Code:
package com.myjava.string;

public class MyStringTrim {
    public static void main(String a[]){
        String str = "  Junk   ";
        System.out.println(str.trim());
    }
}

Example Output

Junk

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