package Set_two;

public class q1_7_2 {

  public static void main(String[] args) {

  int[] array;

  array = new int[10];

  System.out.printf("%s%8s\n", "Index","Value");

  for(int i =0; i<array.length; i++)

   System.out.printf("%s%8d\n", i,array[i]);

 }

}

package Set_two;

public class q1_7_3 {

  public static void main(String[] args) {

  int[] array = { 32, 27, 64, 18, 95, 14, 90, 70, 60, 37 };

  System.out.printf("%s%8s\n", "Index","Value");

  for(int i =0; i<array.length; i++)

   System.out.printf("%s%8d\n", i+1,array[i]);

 }

}

package Set_two;

public class q1_7_5 {

  public static void main(String[] args){

  int[] array = { 87, 68, 94, 100, 83, 78, 85, 91, 76, 87 };

  int total = 0;

  for(int i = 0; i< array.length; i++)

  {

   if(i==array.length-1)

    System.out.printf("%d = ",array[i]);

   else

    System.out.printf("%d + ",array[i]);

   total+=array[i];

  }

  System.out.println(total);

 }

}

package Set_two;

public class q1_7_6 {

  public static void main(String[] args){

  int[] array = { 0, 0, 0, 0, 0, 0, 1, 2, 4, 2, 1 };

  System.out.println("Grade distribution : ");

  for(int i = 0; i<array.length; i++)

  {

   if(i==10)

    System.out.printf("%5d:", 100);

   else

    System.out.printf("%02d-%02d:", i*10, i*10+9);

   for(int j = 0; j<array[i]; j++)

    System.out.print("*");

   System.out.println();

  }

 }

}

package Set_two;

import java.util.Random;

public class q1_7_7 {

  public static void main(String[] args){

  Random x = new Random();

  int[] a = new int[7];

  for(int i = 1; i <= 6000000; i++)

   ++a[1+x.nextInt(6)];

  System.out.printf( "%s%10s\n", "Face", "Frequency" );

  for(int j =1; j<a.length; j++){

   System.out.printf( "%4d%10d\n", j, a[ j ] );

  }

 }

}

Part 1 : GradeBook.java

package Set_two;

public class GradeBook {

String cn;

int[] g;

float total = 0;

int min = 999;

int max = -1;

public GradeBook(String name, int[] a){

  cn = name;

 g = a;

}

public void setcn(String name){

 cn = name;

}

public String getcn(){

 return cn;

}

public void displayMessage()

{

 System.out.printf("Welcome to the gradebook for %s\n\n",getcn());

}

public void processGrades(){

 System.out.println("The grade is : \n\n");

 for(int i = 0; i<g.length; i++){

  System.out.printf("Student %d: %d\n",i+1,g[i]);

  total += g[i];

 }

 System.out.printf("\nClass avarage : %2.2f\n", getaverage());

 System.out.printf("Lowest Grade : %d\n", getlow());

 System.out.printf("Highest Grade : %d\n", gethigh());}

private float getaverage() {

 return total/g.length;

}

private int gethigh() {

 for(int i = 0; i<g.length; i++){

  if(max<g[i])

   max = g[i];

 }

 return max;

}

private int getlow() {

 for(int i = 0; i<g.length; i++)

  {

  if(min>g[i])

  min = g[i];

  }

 return min;

}

}

Part 2 : Mainfunction

package Set_two;

public class q1_7_14 {

  public static void main( String[] args ){

  int[] gradesArray = { 87, 68, 94, 100, 83, 78, 85, 91, 76, 87 };

  GradeBook myGradeBook = new GradeBook("CS101 Introduction to Java Programming",gradesArray );

  myGradeBook.displayMessage();

  myGradeBook.processGrades();

 }

}

package Set_two;

public class q1_7_17 {

  public static void main( String[] args )

 {

  int[][] array1 = { { 1, 2, 3 }, { 4, 5, 6 } };

  int[][] array2 = { { 1, 2 }, { 3 }, { 4, 5, 6 } };

  System.out.println( "Values in array1 by row are" );

  outputArray( array1 );

  System.out.println( "\nValues in array2 by row are" );

  outputArray( array2 );

 }

 public static void outputArray(int[][] array ){

  for ( int row = 0; row < array.length; row++ )

  {

  for ( int column = 0; column < array[ row ].length; column++ )

  System.out.printf( "%d ", array[ row ][ column ] );

  System.out.println();

  }

 }

}