In the equation x = y%z, the variables are y = 25 and z = 11. If all variables are doubles, what is the value of x?
A. 3.00000
B. 2.272727
C. 275.000
D. No value – compiler error.
D. No value – compiler error.
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What exception is thrown if the class loader cannot locate the driver class?
a. NoSuchClassException. b. ClassCastException. c. ClassNotFoundException. d. IllegalClassException.
Which user interface component gives a user visual feedback on loading progress?
What will be an ideal response?
The Line Length application should draw a straight black line on a JFrame and calculate the length of the line. The line should begin at the coordinates where the mouse button is pressed and should stop at the point where the mouse button is released. The application should display the line’s length (that is, the distance between the two endpoints) in the Length= JTextField. Use the following formula to calculate the line’s length, where (x1 , y1 ) is the first endpoint (the coordinates where the mouse button is pressed) and (x2 , y2 ) is the second endpoint (the coordinates where the mouse button is released). To calculate the distance (or length) between the two points, use the following equation:
To draw a straight line, you need to use the drawLine method on a Graphics object. Use the following method call to draw a black line between the two points using a Graphics object reference g:
a) Copying the template to your working directory. Copy the C:Examples Tutorial21ExercisesLineLength directory to your C:SimplyJava directory.
b) Opening the template file. Open the LineLength.java file in your text editor.
c) Coding the lineLengthMousePressed method. Find the lineLengthMousePressed method, which starts at line 97. Inside the lineLengthMousePressed method, add code to clear lengthJTextField, store the x- coordinate in instance variable point1x (declared for you in the template) using the statement event.getX()and store the y- coordinate in instance variable point1y (declared for you in the tem-
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The feature that allows a user to enter dates into Date/Time fields by clicking on a calendar is called the Date ________
Fill in the blank(s) with correct word