Wednesday, March 18, 2020

Free Essays on Mothers Night

Spies I have just recently finished reading the book â€Å"Mothers Night†, by Kurt Vonnegut. This book focuses and is based on events that occurred during the World War Two era. The book includes extreme events in which i am a sure that probably never happened. But there are many events that I could see happening. The book is about a man named Campbell, a confused spy. Campbell has found himself not as normal spy but a double spy. What I mean by this is that he is actually acting as a spy for two countries, the U.S. and Germany. It is like he really can’t make up his mind on which country he likes more. I also see him trying to find himself in the novel; he has been through many hard times in the novel. I think the novel helps to show just how hard times were back during the Second World War, along with just overall war. I also liked how this novel gave me a story to follow along with that was pretty much unpredictable. The book was always keeping me guessing and w as not what I thought it would be. Now I would like to talk about one of the most intriguing topics in the book, most intriguing to me anyway. This would be the act of spying and the spies themselves. Just the name â€Å"spy† get the hair on my neck standing up. It is a sleek and sly word, it sounds cool to. I would have to say that I somewhat admire spies and what they do. It has got to be hard, I mean just think about it. If you can’t then read this book and I am sure it will make you think. It made me think about spies when I never really gave them the time of day until reading the book â€Å"Mother Night†. Spies live life on the edge. I mean could you just imagine how difficult it could be? The book shows just how hard it really is, in the end of the novel Campbell is driven into killing himself. He had no desire to live because he felt like he had no life. He felt as if he was just a tool. This hurt him, along with the feeling that he co... Free Essays on Mothers Night Free Essays on Mothers Night Spies I have just recently finished reading the book â€Å"Mothers Night†, by Kurt Vonnegut. This book focuses and is based on events that occurred during the World War Two era. The book includes extreme events in which i am a sure that probably never happened. But there are many events that I could see happening. The book is about a man named Campbell, a confused spy. Campbell has found himself not as normal spy but a double spy. What I mean by this is that he is actually acting as a spy for two countries, the U.S. and Germany. It is like he really can’t make up his mind on which country he likes more. I also see him trying to find himself in the novel; he has been through many hard times in the novel. I think the novel helps to show just how hard times were back during the Second World War, along with just overall war. I also liked how this novel gave me a story to follow along with that was pretty much unpredictable. The book was always keeping me guessing and w as not what I thought it would be. Now I would like to talk about one of the most intriguing topics in the book, most intriguing to me anyway. This would be the act of spying and the spies themselves. Just the name â€Å"spy† get the hair on my neck standing up. It is a sleek and sly word, it sounds cool to. I would have to say that I somewhat admire spies and what they do. It has got to be hard, I mean just think about it. If you can’t then read this book and I am sure it will make you think. It made me think about spies when I never really gave them the time of day until reading the book â€Å"Mother Night†. Spies live life on the edge. I mean could you just imagine how difficult it could be? The book shows just how hard it really is, in the end of the novel Campbell is driven into killing himself. He had no desire to live because he felt like he had no life. He felt as if he was just a tool. This hurt him, along with the feeling that he co...

Monday, March 2, 2020

Using Accessors and Mutators in Java

Using Accessors and Mutators in Java One of the ways we can enforce data encapsulation is through the use of accessors and mutators. The role of accessors and mutators are to return and set the values of an objects state. Lets learn how to program accessors and mutators in Java. As an example, well use a Person class with the state and constructor already defined: Accessor Methods An accessor method is used to return the value of a private field. It follows a naming scheme prefixing the word get to the start of the method name. For example lets add accessor methods for firstname, middleNames and lastname: These methods always return the same data type as their corresponding private field (e.g., String) and then simply return the value of that private field. We can now access their values through the methods of a Person object: Mutator Methods A mutator method is used to set a value of a private field. It follows a naming scheme prefixing the word set to the start of the method name. For example, lets add mutator fields for address and username: These methods do not have a return type and accept a parameter that is the same data type as their corresponding private field. The parameter is then used to set the value of that private field. Its now possible to modify the values for the address and username inside the Person object: Why Use Accessors and Mutators? Its easy to come to the conclusion that we could just change the private fields of the class definition to be public and achieve the same results. Its important to remember that we want to hide the data of the object as much as possible. The extra buffer provided by these methods allows us to: Change how the data is handled behind the scenes.Impose validation on the values that the fields are being set to. Lets say we decide to modify how we store middle names. Instead of just one String we can now use an array of Strings: The implementation inside the object has changed but the outside world is not affected. The way the methods are called remains exactly the same: Or, lets say the application that is using the Person object can only accept usernames that have a maximum of ten characters. We can add validation in the setUsername mutator to make sure the username conforms to this requirement: Now if the username passed to the setUsername mutator is longer than ten characters it is automatically truncated.