Which of the following are false. A Java variable can begin with the underscore character. A Java identifier can begin with a digit such as 1,2,3, etc A Java identifier can begin with a letter of the alphabet. All of the above are true statements.
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Which of the following are false.
A Java variable can begin with the underscore character.
A Java identifier can begin with a digit such as 1,2,3, etc
A Java identifier can begin with a letter of the alphabet.
All of the above are true statements.
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- Write a Java regular expression for each of the following: a. Phone numbers, such as (609) 555-1234 b. Social Security numbers, such as 123-45-6789 c. Dates, such as December 31, 1999java a. Write the complete statement needed to declare and initialize a new constant to represent the number of weeks in a year, which is 52. Name it "weeks in year" using correct style for a constant. Note: The Java style guide states that one space is used on either side of binary operators. b. Write a simple expression using a relational operator that returns true if the integer variable count is at least 12. Do not use any parentheses or place it in a complete statement.QUESTION 2 Write a Java program to do the following task: Assign your id number (example. 2014299123) to an integer variable id_num Using reminder operator % on the id_num get the last 2 digits (23) and store it in num If the num is between 0 and 30 (both included), display "You are in Group 1" Otherwise if the num is between 31 and 60 (both included), display "You are in Group 2" Otherwise (num is between 61 and 99 (both included), display "You are in Group 3" Save your file as Q2.Java and upload it.
- QUESTION 2 Write a Java program to do the following task: Assign your id number (example. 2014299123) to an integer variable id_num Using reminder operator % on the id_num get the last 2 digits (23) and store it in num If the num is between 0 and 30 (both included), display "You are in Group 1" Otherwise if the num is between 31 and 60 (both included), display "You are in Group 2" Otherwise (num is between 61 and 99 (both included), display "You are in Group 3" Save your file as Q2.Java and upload it. Attach File Browse My ComputerEnsure the file named Furniture.java is open. The file includes variable declarations and output statements. Read them carefully before you proceed to the next step. Design the logic and write the Java code that will use assignment statements to: Calculate the profit (profit) as the retail price minus the wholesale price Calculate the sale price (salePrice) as 25 percent deducted from the retail price Calculate the sale profit (saleProfit) as the sale price minus the wholesale price. Execute the program by clicking Run. Your output should be as follows: Item Name: TV Stand Retail Price: $325 Wholesale Price: $200 Profit: $125 Sale Price: $243.75 Sale Profit: $43.751. In a sample Java source code three variables ag1, age2 and age3 are declared as integers, where age3 stores the sum of age1 and age2. An object showAge is also defined in the code; write only a print statement to display the sum of age1 and age2 using the object 2. Write a simple program in Java to display the age of a father from the following statement: The sum of ages of two sons is 5 less than the age of their father 3. Write an executable source code in Java that receives two decimal numbers from a user and returns their average on a display screen
- • FormulaEvaluator.java Requirements: Evaluate the following expression for any value of the variable x, and save the result in a variable of the type double. You must use the abs(), pow(), and sqrt() methods of the Math class to perform the calculation. You may use a single assignment statement with a somewhat large expression, or you may break the expression into multiple assignment statements. The latter may be easier to debug if you are not getting the correct result. 5x +3} ( √8x* — 6x²³ + 4x² + |20x+1) (9x³+7x² +5x+3) Next, determine the number of digits to the left and to the right of the decimal point in the result. [Hint: You can convert the double variable into a String variable using the static method Double.toString(result). Then, on this String variable use the indexOf() method from the String class to find the position of the decimal point (".") and use the length() method to find the length. Knowing the location of the decimal point and the length of the String, you…1. Write the java statement that assigns 1 to x y is greater than 0 2. Suppose that score is a variable of type double. Write the java statement that if increases the score by 5 marks if score is between 80 and 90 3. Convert the following switch statement into if-else statements then into if-then statements: String dayStringl, dayString2, dayString3; int day = KB.nextInt (); switch (day) { case 1: dayStringl case 2: dayString2 = "Sunday"; "Saturday"; break; case 3: dayString3 = "Monday"; break; case 4: dayStringl case 5: dayString2 break; "Tuesday"; "Wednesday"; %3D = "Invalid day"; default: dayString3 break; 4. Write a program that displays the following pattern: A A A A ВВ AA A ССС AA AA DDDD ΑΑAAΑ EEEEE AAA A A A FFFFFFWrite Java statements to do the following (Make sure to number your answers): Define a constant PI initialized to 3.14159265 and a constant e initialized to 2.718282.Define the variables n as an integer, and factorial as a double.Assign the value 25 to the variable n.Include a comment "Stirling's formula".Write an assignment statement using the Stirling's formula provided below to calculate and assign the result to the variable factorial.??2??√?? 6. Display the result with three decimal places on the console.
- When we declare a variable in Java, we : Give the variable a name Specify the type of the variable Optionally give the variable an initial value. All of the aboveIndicate whether or not the following is a valid Java statement. Whenever the statement is invalid, briefly explain why. String country "Canada";Help needed ASAP! Language: JAVA Fill in your code for the following program that takes two words as input from the keyboard, representing a user ID and a password, then the program does the following: If the user ID and the password match “admin” and “open”, respectively, then output “Welcome”. If the user ID matches “admin” and the password does not match “open”, output “Wrong password”. If the password matches “open” and the user ID does not match “admin”, output “Wrong user ID”. Otherwise, output “Sorry, wrong ID and password”. import java.util.Scanner; public class Login{ public static void main(String[] args){ Scanner scan = ____ Scanner(________);//instantiate a Scanner object String userID = scan._________; // read the user ID String password = scan.__________; // read the password if(________________________________) { System.out.println("Welcome"); } else if(___________________________) { System.out.println("Wrong password"); } else…