Question: Please help me??

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aminah
Please help me??
0 Answer(s)      5 years and 2 months ago
Posted in : Java Beginners

Question_1: Using one-dimension array of primitive type elements. Objective: The purpose of this lab exercise is to practice how to declare, create and manipulate a one-dimension array of primitive type elements. Instructions: 1. Create a new file ArrayDemo.java 2. Declare two integer array called array1 and array2 3. For array1, set initial values to have 8 elements as follows:2, 3, 5, 7, 11, 13, 17, and 19 4. Display array1 with the initial values 5. Make array2 refer to array1 6. Modify element in array2 in index 0,2,4 and 6 to have new values such as 0,2,4 and 6 respectively 7. Print all elements in both array1and array2

Question_2: Using Collection Framework
Objective: To understand the use of List interface and Iterator.
Step1: Create a new java file
FileName: ListDemo.java
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
public class ListDemo {
public static void main(String [] args) {
List myList=new ArrayList(); //comment?
myList.add("Fenny"); //comment?
myList.add("Pinky");
myList.add(new Integer(12)); //comment..
System.out.println(myList); //comment?
Iterator i=myList.iterator();
System.out.println("Printing element by element");
while(i.hasNext()){ //comment
String str=(String)i.next(); // Line 1
System.out.println(str);
}
}
}
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