List Operation in Apex Salesforce

Z`List Operation in Apex

I am going to show you how to do operation like (Add(), sort(),addall(), clear(),clone) in a list.

Developer Console

Apex List and Method

//ADD,sort
List<Integer> IntList = new List<Integer>();//Here list type integer
IntList.add(4);// Adds an element to the end of the list.
IntList.add(6);
IntList.add(0,8);// Inserts an element into the list at the specified index position.
IntList.add(1,9);
IntList.sort();
For(Integer c:IntList)
{
    System.debug(c); //System.debugs():-Its Help to print the Data as like Printf,system.write() in .net

}

//addALL()
List<Integer> IntList=new List<Integer>();
IntList.Add(2);
List<Integer> IntList2=new List<Integer>();
IntList2.Add(3);
List<Integer> IntListMaster=new List<Integer>();
IntListMaster.addAll(IntList);
IntListMaster.addAll(IntList2);
IntListMaster.sort();
For(Integer DD:IntListMaster)
{
    system.debug(DD);
}

Find here the debug result.

//clear():Removes all elements from a list, consequently setting the list's length to zero.
List<Integer> IntList=new List<Integer>();
IntList.Add(2);
List<Integer> IntList2=new List<Integer>();
IntList2.Add(3);
List<Integer> IntListMaster=new List<Integer>();
IntListMaster.addAll(IntList);
IntListMaster.addAll(IntList2);
IntListMaster.clear();
List<Integer> IntList3=new List<Integer>();
IntList3.Add(5);
IntListMaster.addAll(IntList3);
IntListMaster.sort();
For(Integer DD:IntListMaster)
{
    system.debug(DD);
}

Find here the debug result.

List<Integer> IntList=new List<Integer>();
IntList.Add(2);
List<Integer> IntList2=new List<Integer>();
IntList2.Add(3);
List<Integer> IntListMaster=new List<Integer>();
IntListMaster.addAll(IntList);
IntListMaster.addAll(IntList2);
IntListMaster.clear();
List<Integer> IntList3=new List<Integer>();
IntList3.Add(5);
IntListMaster.addAll(IntList3);
IntListMaster.sort();
List<Integer> IntListMaster1=new List<Integer>();
IntListMaster1=IntListMaster.clone();
system.debug(IntListMaster1.size());
For(Integer DD:IntListMaster1)
{
    system.debug(DD);
}