79 lines
1.7 KiB
Java
79 lines
1.7 KiB
Java
package staticInnerClass;
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/**
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* This program demonstrates the use of static inner classes.
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* @version 1.02 2015-05-12
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* @author Cay Horstmann
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*/
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public class StaticInnerClassTest
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{
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public static void main(String[] args)
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{
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double[] d = new double[20];
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for (int i = 0; i < d.length; i++)
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d[i] = 100 * Math.random();
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ArrayAlg.Pair p = ArrayAlg.minmax(d);
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System.out.println("min = " + p.getFirst());
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System.out.println("max = " + p.getSecond());
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}
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}
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class ArrayAlg
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{
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/**
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* A pair of floating-point numbers
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*/
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public static class Pair
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{
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private double first;
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private double second;
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/**
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* Constructs a pair from two floating-point numbers
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* @param f the first number
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* @param s the second number
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*/
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public Pair(double f, double s)
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{
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first = f;
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second = s;
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}
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/**
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* Returns the first number of the pair
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* @return the first number
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*/
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public double getFirst()
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{
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return first;
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}
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/**
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* Returns the second number of the pair
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* @return the second number
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*/
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public double getSecond()
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{
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return second;
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}
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}
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/**
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* Computes both the minimum and the maximum of an array
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* @param values an array of floating-point numbers
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* @return a pair whose first element is the minimum and whose second element
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* is the maximum
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*/
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public static Pair minmax(double[] values)
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{
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double min = Double.POSITIVE_INFINITY;
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double max = Double.NEGATIVE_INFINITY;
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for (double v : values)
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{
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if (min > v) min = v;
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if (max < v) max = v;
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}
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return new Pair(min, max);
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}
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}
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