Solving Array Problems in Java

class ArrayDemo {

public static void main(String[] args) {

int[] anArray; // declares an array of integers

anArray = new int[10]; // allocates memory for 10 integers

anArray[0] = 100; // initialize first element

anArray[1] = 200; // initialize second element

anArray[2] = 300; // etc.

anArray[3] = 400;

anArray[4] = 500;

anArray[5] = 600;

anArray[6] = 700;

anArray[7] = 800;

anArray[8] = 900;

anArray[9] = 1000;

System.out.println("Element at index 0: " + anArray[0]);

System.out.println("Element at index 1: " + anArray[1]);

System.out.println("Element at index 2: " + anArray[2]);

System.out.println("Element at index 3: " + anArray[3]);

System.out.println("Element at index 4: " + anArray[4]);

System.out.println("Element at index 5: " + anArray[5]);

System.out.println("Element at index 6: " + anArray[6]);

System.out.println("Element at index 7: " + anArray[7]);

System.out.println("Element at index 8: " + anArray[8]);

System.out.println("Element at index 9: " + anArray[9]);

                }

}

Identify and correct the syntax error in each of the following array declaration.

(a)    float arr[] = new float {1.0,2.0,3.0};

float[] arr= {1.0,2.0,3.0};

class ArrayDemo1 {

public static void main(String[] args) {

double myList[] = {5.6, 4.5, 3.3, 13.2, 4, 34.33, 34, 45.45, 99.993, 11.3};

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

System.out.println("Element at index" + i + ": " + myList[i]);

}

}}

Use Enchance Loop

class ArrayDemo2 {

public static void main(String[] args) {

double myList[] = {5.6, 4.5, 3.3, 13.2, 4, 34.33, 34, 45.45, 99.993, 11.3};

for (double i: myList) {

System.out.println(i);

}

}

}

Write a program that receives 6 numbers from the user, finds the largest number and counts the occurrence of the largest number entered.

Suppose you entered 3, 5, 2, 5, 5, and 5, the largest number is 5 and its occurrence count is 4.

import java.util.Scanner;

class TestingArray{

public static void main(String args[]){

int[] testArr = new int[6];

Scanner input= new Scanner(System.in);

System.out.println("Enter" + testArr.length + "numbers.");

int biggest=testArr[0];

int visited = -1;

int [] fr = new int [testArr.length];

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

System.out.print("Enter number:" + (i+1) +":" );

testArr[i] = input.nextInt();

}

for(int j=0;j<testArr.length;j++){

System.out.println("Elements:"+ testArr[j]);

}

for(int k=0;k<testArr.length;k++){

if (testArr[k]>biggest)

biggest= testArr[k];

}

System.out.print("The biggest number:"+ biggest);

for(int l = 0; l < testArr.length; l++){ 

int count = 1; 

for(int m = l+1; m < testArr.length; m++){ 

if(testArr[l] == testArr[m]){ 

count++; 

                    //To avoid counting same element again 

fr[m] = visited; 

                } 

            } 

if(fr[l] != visited) 

fr[l] = count; 

        } 

System.out.println("---------------------"); 

System.out.println(" Element | Frequency"); 

System.out.println("---------------------"); 

for(int n = 0; n < fr.length; n++){ 

if(fr[n] != visited) 

System.out.println("    " + testArr[n] + "    |    " + fr[n]); 

        } 

System.out.println("---------------------"); 

}

}