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Java Program to insert all elements of other Collection to specified Index of ArrayList
Let us first create an ArraList and add some elements to it −
ArrayList < String > arr = new ArrayList < String > ();
arr.add("50");
arr.add("100");
arr.add("150");
arr.add("200");
arr.add("250");
arr.add("300");
Now, create a new collection. We are creating Vector here −
Vector<String>vector = new Vector<String>();
vector.add("500");
vector.add("700");
vector.add("800");
vector.add("1000");
Now, we will append all the elements of the above Vector to our ArrayList beginning from index 3 −
arr.addAll(3, vector);
Example
import java.util.ArrayList;
import java.util.Vector;
public class Demo {
public static void main(String[] args) {
ArrayList<String>arr = new ArrayList<String>();
arr.add("50");
arr.add("100");
arr.add("150");
arr.add("200");
arr.add("250");
arr.add("300");
Vector<String>vector = new Vector<String>();
vector.add("500");
vector.add("700");
vector.add("800");
vector.add("1000");
// gets added at index 3
arr.addAll(3, vector);
System.out.println("Result after append...");
for (String str: arr)
System.out.println(str);
}
}
Output
Result after append... 50 100 150 500 700 800 1000 200 250 300
Updated on: 2019-07-30T22:30:25+05:30
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