import java.util.Random;

public class Arr
{
	public static void changeArray(int [] array)
	{
			for(int i = 0; i < array.length; i++)
			array[i] *= 2;
	}

	public static void display(int [] array)
	{
		for(int e : array)
			System.out.println(e);
	}

	public static void main(String args[])
	{
		int [] array = new int[10];
		//int array [] = new int[10];

		Random r = new Random();
		for(int i = 0; i < array.length; i++)
			array[i] = r.nextInt(10);

		display(array);
		changeArray(array);
		display(array);
	}
}
			

import java.util.Random;
import java.util.Arrays;

public class Arr
{
	public static void sort(int [] array)
	{
		Arrays.sort(array);
	}

	public static void display(int [] array)
	{
		for(int e : array)
			System.out.println(e);
	}

	public static int [] init()
	{
		int [] array = new int[10];

		Random r = new Random();
		for(int i = 0; i < array.length; i++)
			array[i] = r.nextInt(10);

		return array;
	}

	public static void main(String args[])
	{
		int [] array;
		array = init();

		display(array);
		sort(array);
		display(array);
	}
}
			

import java.util.Random;
import java.util.Arrays;

public class Arr
{
	public static void display(int [][] array)
	{
		for(int [] row : array)
		{
			for(int e : row)
				System.out.printf("%10d", e);
			System.out.printf("%n");
		}
	}

	public static int [][] init()
	{
		int [][] array = new int[2][5];

		Random r = new Random();
		for(int i = 0; i < array.length; i++)
			for(int j = 0; j < array[i].length; j++)
				array[i][j] = r.nextInt(10);

		return array;
	}

	public static void main(String args[])
	{
		int [][] array;
		array = init();

		display(array);
	}
}
			

import java.util.Random;
import java.util.Arrays;

public class Arr
{
	public static void display2(int [][] array)
	{
		for(int [] row : array)
		{
			for(int e : row)
				System.out.printf("%10d", e);
			System.out.printf("%n");
		}
	}

	public static void display(int [] array)
	{
		for(int e : array)
			System.out.printf("%10d", e);
		System.out.println();
	}

	public static int [][] getArray2()
	{
		int [][] array = new int[2][5];

		Random r = new Random();
		for(int i = 0; i < array.length; i++)
			for(int j = 0; j < array.length; j++)
				array[i][j] = r.nextInt(10);

		return array;
	}

	public static int [] getArray()
	{
		int [] array = new int[10];

		Random r = new Random();
		for(int i = 0; i < array.length; i++)
			array[i] = r.nextInt(10);
		return array;
	}

	public static void main(String args[])
	{
		//copy one dimensional array
		int [] array;
		array = getArray();

		int [] array2 = new int[array.length];
		System.arraycopy(array, 0, array2, 0, array.length);

		display(array2);

		int [] array3;
		array3 = Arrays.copyOf(array, array.length);
		display(array3);

		//three arrays point to different address
		System.out.println(System.identityHashCode(array));
		System.out.println(System.identityHashCode(array2));
		System.out.println(System.identityHashCode(array3));

		//copy two dimensional array
		int [][] array4;
		array4 = getArray2();

		display2(array4);

		int [][] array5;
		array5 = new int[array4.length][];
		for(int i = 0; i < array4.length; i++)
			array5[i] = Arrays.copyOf(array4[i], array4[i].length);

		display2(array5);
	}
}
			

public class Car
{
	private String maker;
	private String color;

	Car(){}

	public String getMaker()
	{
		return maker;
	}

	public String getColor()
	{
		return color;
	}

	public void setMaker(String m)
	{
		maker = m;
	}

	public void setColor(String c)
	{
		color = c;
	}
}
			

public class CarArray
{
	public static void main(String args[])
	{
		Car c[] = new Car[10];

		for(int i = 0; i < 10; i++)
		{
			c[i] = new Car();
			c[i].setMaker("Buick");
			c[i].setColor("White");
		}

		c[4].setMaker("Honda");
		c[4].setColor("Blue");

		for(int i = 0; i < 10; i++)
			System.out.println(c[i].getMaker()+" "+c[i].getColor());
	}
}
			

public class Car implements Comparable
{
	private String maker;
	private String color;

	public Car(String m, String c)
	{
		maker = m;
		color = c;
	}

	public int compareTo(Car c)
	{
		return maker.compareTo(c.maker);
	}

	public String toString()
	{
		return maker+" "+color;
	}
}
			

import java.util.*;

public class CarArray
{
	public static void main(String args[])
	{
		Car c[] = new Car[3];

		c[0] = new Car("Buick", "White");
		c[1] = new Car("Honda", "Blue");
		c[2] = new Car("Acura", "Blue");

		Arrays.sort(c);

		for(int i = 0; i < 3; i++)
			System.out.println(c[i]);
	}
}