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SQL语句教程，介绍各种SQL语句~~~~~~~~~~~~~~~~~~

Write a Swing application for a video store named Video.java.Place the names of 10 of your favorite movies in a drop-down list.Let the user select the movie he or she wants to rent. Charge $2 for most movies, and $2.50 for your personal favorite movie. Display the rental fee.

Create an application ChangeBallColor that displays a panel. This panel will contain two buttons (one for red and one for blue). It will also display a filled in circle. When the user clicks on a button, the circle should change to that color. So, if a user clicks the blue button, the circle will change to blue. Similarly, if a user clicks the red button, the circle will turn to red.

Create an application ShapesTest that displays various shapes in various colors. • a line in black color • a circle in green color • a rectangle in orange color Use the lecture notes for a guide. You should create 3 classes named: • ShapesTest.java • ShapesFrame.java • ShapesPanel.java

Create an application DisplayNames that displays your name in every even-numbered font from size 4 to 24. Make the color red. You should create 3 classes named: • DrawNamesTest.java • NamesFrame.java • NamesPanel.java

Create an interface called Playing. The interface has an abstract method called play(). Create classes called Child, Musician and Actor that implement Playing. Create a program that demonstrates the use of the classes. Playing.java Child.java Musician.java Actor.java UsePlaying.java Sample Output: I am a child and I am playing a game I am a musician and I am playing a song I am an actor and I am playing a part

Create an abstract Auto class with fields for the car make and price. Include get and set methods for these fields; the setPrice() method is abstract. Create two suclasses for individual automobile makers (for example, Ford and Chevy) and include appropriate setPrice() methods in each subclass. Finally, write a program that uses the Auto class and subclasses to display information about different cars. The java programs should be named like: Auto.java Ford.java Chevy.java UseAuto.java Sample Output: A new Ford costs $20000.0 A new Chevy costs $22000.0

Write a program called CollegeCourse that computes the cost of taking a college course. Include a constructor that requires a course ID number. Add a subclass Lab to compute a lab fee for a course that uses a lab. Write a program UseCourse to use the classes. Save the progras as CollegeCourse, Lab, and UseCourse. Put them all in a package called edu.ynu.lab7. Hints: how to compile and run your programs in the DOS environment, if using Jcreator you don't have to worry about this (suppose you put all your work under c:\java\lab7) Compile the classes by using the command: javac -d c:\java\lab7\*.java Run the example by going to c:\java\lab7 and typing: java ynu/edu/lab7/UseCourse For example, the output could be: The cost of your course is $180.0 there is a $25.00 lab fee. The cost of your course is $205.0 Program 2 Create an abstract Auto class with fields for the car make and price. Include get and set methods for these fields; the setPrice() method is abstract. Create two suclasses for individual automobile makers (for example, Ford and Chevy) and include appropriate setPrice() methods in each subclass. Finally, write a program that uses the Auto class and subclasses to display information about different cars. The java programs should be named like: Auto.java Ford.java Chevy.java UseAuto.java Sample Output: A new Ford costs $20000.0 A new Chevy costs $22000.0

Write a class called Person with the following attributes: title (Mr., Mrs., Ms., etc.) first name last name nickname age in years sex (boolean - true/false to indicated either male or female) Write a constructor that takes no parameters and performs no initializations. Write a constructor that takes a parameter for each of the attributes listed above and sets them within the objects by calling the setter methods listed below. The Person class should have a setter method and a getter method with public access for each attribute. In the setter methods, get rid of any leading or trailing spaces (String trim() method). For a Person with the following attributes: title = "Mr." first name = "Michael" last name = "Zheng" nickname = "Mike" age = 22 sex = true (true is male, false is female) The Person class should have the following public access methods that return Strings as follows: standardName() concatenation of the first and last names (i.e., "Michael Zheng") formalName() concatenation of the title, first name, lastname (i.e., "Mr. Michael Zheng") casualName() return the nickname if it is not null, otherwise return the first name (i.e., "Mike") Be realistic when generating names. If a particular attribute does not exist for a given person, don't try to concatenate it. If necessary, add appropriate spacing and punctuation, but do not leave any leading or trailing spaces in the String that is returned. MakePerson Write a class called MakePerson with a main() method that instantiates 2 Person objects. Initialize the attributes of one of the Person objects by supplying parameters to it's constructor. Instantiate the other Person object with the default constructor (that does not accept any parameters), then set it's attributes via the appropriate setter methods. For each of the Person objects, execute and print (System.out.println()) the results of all of the getter methods and of the standardName(), formalName(), and casualName() methods.

Create a class called Circle.java with fields named radius, area, and diameter. Include methods named setRadius(), getRadius, and computeDiameter(), which calculates the circle's diameter, and computeArea(), which computes the circle's area. Hint: diameter of a circle is twice its radius. Hint: area of a circle is 3.14 multiplied by the square of the radius. Create a class called TestCircle. java whose main method declares 2 Circle objects. Using setRadius() method, assign one Circle a small radius value and assign another a larger radius value. Call computeDiameter() and computeArea for each circle and display the results. Output result of using command input "5 8": The area of a is 78.5 The diameter of a is 10.0 The area of b is 200.96 The diameter of b is 16.0

Design and write a Java class named SalesArray.java that will: 1. Declare a two-dimensional integer array named sales. Populate the first four columns using the following data. Quarter 1 Quarter 2 Quarter3 Quarter 4 Total Dept. 1 750 660 910 800 Dept. 2 800 700 950 900 Dept. 3 700 600 750 600

Write a program called StringTokenizer1.java that accepts a string, looks for commas within the string, and breaks the string up into the parts separated by the comma. For example, the string "Kunming, Yunnan, China" would return three strings: String1 = "Kunming" String2 = "Yunnan" String3 = "China"

Write a program called String1.java and do the following: Create a String object that accepts input from the user. Referencing the JDK docs, execute 2 different methods on the String. Print the results of the methods. Result: Input a string: How are you length of string is 11 first 5 bytes of

Write a Java program called ContinueLoop.java that uses a for loop with the variable "count" and count 1 to 10.. Display "count=<count>" each time you loop through. Skip the display statement using the continue statement if count = 5. At the end of the program display "Used continue to skip printing 5". Output: count = 1 count = 2 count = 3 count = 4 count = 6 count = 7 count = 8 count = 9 count = 10 Used continue statement to skip printing 5

Write a Java program called BreakLoop.java that uses a for loop with the variable "count" and count 1 to 10.. Display "count=<count>" each time you loop through. Break out of the loop at 5. At the end of the program display "Broke out of the loop at count = 5". Output: count = 1 count = 2 count = 3 count = 4 Broke out of the loop at count = 5

Write a Java program called InputParms.java that accepts 3 arguments in the main method using an array. Iterate through the array looking for your name using a for loop. Display the message "The name <your name> was found" if your name is found. For example, using the following command Java InputParms I am Michael Output: The name Michael was found.

Write a Java program called AverageNumbers2.java that calculates the average of numbers 1 to 50 using the for loop. Do it again using the while loop. Output: average of numbers is 25.5

Write a Java payroll program called Payroll.java that determines pay and taxes. Set the following variables: pay = $25 per hour hoursWorked = 40 Calculate grossPay by multiplying pay * hoursWorked. Calculate taxesWithheld by multiplying grossPay * .15. Calculate netPay by subtracting taxesWithheld from grossPay. Display all variables. Output: Gross pay: $1000.0 Withholding tax: $150.0 Net pay: $850.0

Write a temperature conversion Java program called FarheheitToCentigrade.java. Set a variable called tempFarenheit = 98.6. Calculate the Centigrade temp (tempCelcius) by using the formula Centigrade = 5/9 (Fahrenheit -32) Output: Centigrade equivalent: 37.0

Write Java program called AverageNumbers.java to determine the average of several numbers. Set the following five integer variables: int1 = 5 int2 = 7 int3 = 4 int4 = 25 int5 = 13 Calculate and display the average of these numbers and the square root of average.

数据结构关于图的实验报告原程序~~~~~~~~~~~~~~~~~~~~~~~~~~~~~