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52 lines
1.7 KiB
Java
52 lines
1.7 KiB
Java
Simple Mathematical Calculations
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// Exercise 3.12 Solution: Multiples.java
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// Given two doubles as input, the program determines if the first// is a multiple of the second.
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// Java core packages
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import java.awt.Graphics; // import class Graphics
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// Java extension packages
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import javax.swing.*; // import package javax.swing
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public class Multiples extends JApplet {
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String result; // output display String
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// initialize applet by obtaining values from user
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public void init()
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{
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String firstNumber; // first String entered by user
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String secondNumber; // second String entered by user
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double number1; // first number to compare
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double number2; // second number to compare
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// read first number from user as a String
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firstNumber =
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JOptionPane.showInputDialog( "Enter first floating-point number:" );
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// read second number from user as a String
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secondNumber =
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JOptionPane.showInputDialog( "Enter second floating-point number:" );
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// convert numbers from type String to type double
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number1 = Double.parseDouble( firstNumber );
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number2 = Double.parseDouble( secondNumber );
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if ( number1 % number2 == 0 )
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result = number1 + " is a multiple of " + number2;
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if ( number1 % number2 != 0 )
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result = number1 + " is not a multiple of " + number2;
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} // end method init
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// draw results on applet's background
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public void paint( Graphics g )
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{
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// draw result as a String at (25, 25)
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g.drawString( result, 25, 25 );
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} // end method paint
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} // end class OddEven
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