JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: How to convert list to csv string format?


Description:

This example shows how to convert given list of strings to comma seperated values (csv) format.


Code:
package com.java2novice.arraylist;

import java.util.ArrayList;
import java.util.List;

public class MyListToCsvString {

	public String getListAsCsvString(List<String> list){
		
		StringBuilder sb = new StringBuilder();
		for(String str:list){
			if(sb.length() != 0){
				sb.append(",");
			}
			sb.append(str);
		}
		return sb.toString();
	}
	
	public static void main(String a[]){
		
		List<String> li1 = new ArrayList<String>(){
			{
				this.add("animal");
				this.add("nuts");
				this.add("java");
			}
		};
		MyListToCsvString mtc = new MyListToCsvString();
		System.out.println(mtc.getListAsCsvString(li1));
		List<String> li2 = new ArrayList<String>(){
			{
				this.add("java");
				this.add("unix");
				this.add("c++");
			}
		};
		System.out.println(mtc.getListAsCsvString(li2));
	}
}

Output:
animal,nuts,java
java,unix,c++
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List Of All ArrayList Sample Programs:

  1. Basic ArrayList Operations.
  2. How to read all elements in ArrayList by using iterator?
  3. How to copy or clone a ArrayList?
  4. How to add all elements of a list to ArrayList?
  5. How to delete all elements from my ArrayList?
  6. How to find does ArrayList contains all list elements or not?
  7. How to copy ArrayList to array?
  8. How to get sub list from ArrayList?
  9. How to sort ArrayList using Comparator?
  10. How to reverse ArrayList content?
  11. How to shuffle elements in ArrayList?
  12. How to swap two elements in a ArrayList?
  13. How to convert list to csv string format?
Knowledge Centre
What is abstract class or abstract method?
We cannot create instance for an abstract class. We can able to create instance for its subclass only. By specifying abstract keyword just before class, we can make a class as abstract class.

public abstract class MyAbstractClass{

}

Abstract class may or may not contains abstract methods. Abstract method is just method signature, it does not containes any implementation. Its subclass must provide implementation for abstract methods. Abstract methods are looks like as given below:

public abstract int getLength();
Famous Quotations
It is amazing what you can accomplish if you do not care who gets the credit.
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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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