"Here are a few examples of interesting things you can do with arrays:"
Example 1.
Fill a 10-element array with numbers from 1 to 10:
public class MainClass
{
public static void main(String[] args)
{
int[] numbers = new int[10];
for (int i = 0; i < numbers.length; i++)
{
numbers[i] = i + 1;
}
}
}
Fill a 10-element array with numbers from 10 to 1:
public class MainClass
{
public static void main(String[] args)
{
int[] numbers = new int[10];
for (int i = 0; i < numbers.length; i++)
{
numbers[i] = 10 - i;
}
}
}
Fill a 10-element array with numbers from 0 to 9:
public class MainClass
{
public static void main(String[] args)
{
int[] numbers = new int[10];
for (int i = 0; i < numbers.length; i++)
{
numbers[i] = i;
}
}
}
Fill a 10-element array with numbers from 9 to 0:
public class MainClass
{
public static void main(String[] args)
{
int[] numbers = new int[10];
for (int i = 0; i < numbers.length; i++)
{
numbers[i] = 9 - i;
}
}
}
Example 2.
Read 10 strings from the keyboard:
public class MainClass
{
public static void main(String[] args) throws IOException
{
BufferedReaderreader = new BufferedReader(new InputStreamReader(System.in));
String[] list = new String[10];
for (int i = 0; i < list.length; i++)
{
list[i] = reader.readLine();
}
}
}
Read 10 numbers from the keyboard:
public class MainClass
{
public static void main(String[] args) throws IOException
{
BufferedReaderreader = new BufferedReader(new InputStreamReader(System.in));
int[] list = new int[10];
for (int i = 0; i < list.length; i++)
{
String s = reader.readLine();
list[i] = Integer.parseInt(s);
}
}
}
Example 3.
Display an array on the screen:
public class MainClass
{
public static void main(String[] args) throws IOException
{
int[] list = new int[10];
// Fill the array
for (int i = 0; i < list.length; i++)
{
list[i] = i;
}
// Display the contents of the array
for (int i = 0; i < list.length; i++)
{
System.out.println(list[i]);
}
}
}
Example 4.
Quick (static) initialization. Add up the array elements:
public class MainClass
{
public static void main(String[] args) throws IOException
{
// Static initialization
int[] list = {5, 6, 7, 8, 1, 2, 5, -7, -9, 2, 0};
// Calculate the sum
int sum = 0;
for (int i = 0; i < list.length; i++)
{
sum += list[i];
}
System.out.println("Sum is " + sum);
}
}
Example 5.
Find the smallest element in an array:
public class MainClass
{
public static void main(String[] args) throws IOException
{
int[] list = {5, 6, 7, 8, 1, 2, 5, -7, -9, 2, 0};
int min = list[0];
for (int i = 1; i < list.length; i++)
{
if (list[i] < min)
{
min = list[i];
}
}
System.out.println ("Min is " + min);
}
}
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