What is JavaScript?

JavaScript in text editor

What is JavaScript? Have you ever wondered what JavaScript is and how it works? JavaScript is a programming language that is used to make webpages more interactive. It is the web language and can be used to create dynamic web applications that can provide users with an improved experience. What Are the Top Uses for…

Read More

Declare a Scanner reference variable fileInput, and assign it a newly created Scanner object that is associated with a file named “data1”. (Do not concern yourself with any possible exceptions here– assume they are handled elsewhere.)

java

Declare a Scanner reference variable fileInput, and assign it a newly created Scanner object that is associated with a file named “data1”. (Do not concern yourself with any possible exceptions here– assume they are handled elsewhere.)

Read More

Given an initialized String variable fileName, write a sequence of statements that create a file whose name is given by the variable and whose content is a single line consisting of “This Is File: ” followed by the name of the file. Make sure that the data written to the file has been flushed from its buffer and that any system resources used during the course of running these statements have been released. (Do not concern yourself with any possible exceptions here– assume they are handled elsewhere.)

java

Given an initialized String variable fileName, write a sequence of statements that create a file whose name is given by the variable and whose content is a single line consisting of “This Is File: ” followed by the name of the file. Make sure that the data written to the file has been flushed from its buffer and that any system resources used during the course of running these statements have been released. (Do not concern yourself with any possible exceptions here– assume they are handled elsewhere.)

Read More

Write a sequence of statements that create a file named “greeting” and write a single line consisting of “Hello, World!” to that file. Make sure that the line has been flushed to the file and that any system resources used during the course of running these statements have been released. (Do not concern yourself with any possible exceptions here– assume they are handled elsewhere.)

java

Write a sequence of statements that create a file named “greeting” and write a single line consisting of “Hello, World!” to that file. Make sure that the line has been flushed to the file and that any system resources used during the course of running these statements have been released. (Do not concern yourself with any possible exceptions here– assume they are handled elsewhere.)

Read More

Given an initialized String variable output, write an expression whose value is a reference to a newly created PrintWriter object associated with a file whose name is contained in output. (Do not concern yourself with any possible exceptions here– assume they are handled elsewhere.)

java

Given an initialized String variable output, write an expression whose value is a reference to a newly created PrintWriter object associated with a file whose name is contained in output. (Do not concern yourself with any possible exceptions here– assume they are handled elsewhere.)

Read More

Assume that sentence is a variable of type String that has been assigned a value. Assume furthermore that this value is a String consisting of words separated by single space characters with a period at the end. For example: “This is a possible value of sentence.” Assume that there is another variable declared, firstWord, also of type String. Write the statements needed so that the first word of the value of sentence is assigned to firstWord. So, if the value of sentence were “Broccoli is delicious.” your code would assign the value “Broccoli” to firstWord.

java

Assume that sentence is a variable of type String that has been assigned a value. Assume furthermore that this value is a String consisting of words separated by single space characters with a period at the end. For example: “This is a possible value of sentence.”

Read More

Clunker Motors Inc. is recalling all vehicles in its Extravagant line from model years 1999-2002. A boolean variable named recalled has been declared. Given a variable modelYear and a String modelName write a statement that assigns true to recalled if the values of modelYear and modelName match the recall details and assigns false otherwise.

java

Clunker Motors Inc. is recalling all vehicles in its Extravagant line from model years 1999-2002. A boolean variable named recalled has been declared. Given a variable modelYear and a String modelName write a statement that assigns true to recalled if the values of modelYear and modelName match the recall details and assigns false otherwise.

Read More

Assume that name is a variable of type String that has been assigned a value. Write an expression whose value is the first character of the value of name. So if the value of name were “Smith” the expression’s value would be ‘S’.

java

Assume that name is a variable of type String that has been assigned a value. Write an expression whose value is the first character of the value of name. So if the value of name were “Smith” the expression’s value would be ‘S’.

Read More

Write an expression whose value is a reference to a newly created PrintWriter object associated with a file named “message.log”. The PrintWriter object should be created so that existing content in the file is not destroyed or overwritten, but rather output will be appended to any existing content.(Do not concern yourself with any possible exceptions here– assume they are handled elsewhere.)

java

Write an expression whose value is a reference to a newly created PrintWriter object associated with a file named “message.log”. The b>PrintWriter object should be created so that existing content in the file is not destroyed or overwritten, but rather output will be appended to any existing content.(Do not concern yourself with any possible exceptions here– assume they are handled elsewhere.)

Read More