Sure! Below is the completed code that includes the missing part:
java:
public class ArrayCopy {
public static void main(String[] argv) {
int[][] A = {
{1},
{2, 1},
{3, 2, 1},
{4, 3, 2, 1},
{5, 4, 3, 2, 1}
};
print(A);
int[][] B = copy(A);
print(B);
}
static void print(int[][] X) {
for (int i = 0; i < X.length; i++) {
for (int j = 0; j < X[i].length; j++) {
System.out.print(" " + X[i][j]);
}
System.out.println();
}
}
static int[][] copy(int[][] X) {
int[][] copyArray = new int[X.length][];
for (int i = 0; i < X.length; i++) {
copyArray[i] = new int[X[i].length];
for (int j = 0; j < X[i].length; j++) {
copyArray[i][j] = X[i][j];
}
}
return copyArray;
}
}
In the given code, the missing part is the `copy` method. This method is responsible for creating a copy of the 2D array `A` and returning it as a new 2D array.
The `copy` method initializes a new 2D array `copyArray` with the same number of rows as the original array `X`. It then iterates over each row of `X` and creates a new row in `copyArray` with the same length as the corresponding row in `X`. Finally, it copies the values from each element of `X` to the corresponding element in `copyArray`.
The completed code allows you to print the original array `A` and its copy `B` by calling the `print` method. The `print` method iterates over each element in the 2D array and prints its values row by row.
Note: When running the code, make sure to save it as "ArrayCopy.java" and execute the `main` method.
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Which statement about ROM is true?
The statement "ROM is a non-volatile memory" is true of ROM.
What is ROM?ROM, an acronym for Read-Only Memory, denotes a form of memory that solely permits reading operations, devoid of any writing capability. It serves the purpose of preserving programs and data that are indispensable for initializing a computer system, such as the BIOS (Basic Input/Output System).
The BIOS, an application securely residing in ROM, carries out the crucial task of loading the operating system into the computer's RAM upon powering it on.
ROM essentially comprises an arrangement of transistors, organized in a grid-like structure. Each transistor possesses the ability to exist in either an activated or deactivated state. The intricate arrangement of these activated and deactivated transistors symbolizes the specific data that is immutably stored within ROM.
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Complete question:
Which statement about ROM is true?
(i) It is a volatile memory.
(ii) It is a non-volatile memory.
(iii) It is both a volatile and a non-volatile memory.
b) Use a main method from the JOptionPane to request values from the user to initialize the instance variables of Election objects and assign these objects to the array. The array must be filled.
Below is an example code snippet for this process:
```javaimport javax.swing.JOptionPane;public class ElectionDemo {
public static void main(String[] args) {
Election[] elections = new Election[3];for(int i = 0; i < elections.length; i++) {
String name = JOptionPane.showInputDialog("Enter name of candidate: ");
int votes = Integer.parseInt(JOptionPane.showInputDialog("Enter number of votes: "));
Election e = new Election(name, votes);elections[i] = e;}
for(Election e : elections) {System.out.println(e.getName() + " received " + e.getVotes() + " votes.");
}
}
} ```
The above code snippet is a simple example that uses the JOptionPane to prompt the user to input values for the instance variables of an Election object. Here, we create an array of three Election objects and then use a for loop to initialize each object.
The for loop is a standard loop that iterates through each object in the array.Inside the for loop, we use the JOptionPane to prompt the user to input values for the name and votes variables. The input values are then used to create a new Election object, which is assigned to the current position in the array.
Finally, we use another for loop to print out the name and votes variables for each Election object in the array.
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