34 lines
1008 B
Java
34 lines
1008 B
Java
// onjava/Range.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// Array creation methods that can be used without
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// qualifiers, using static imports:
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package onjava;
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public class Range {
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// Produce a sequence [0..n)
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public static int[] range(int n) {
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int[] result = new int[n];
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for(int i = 0; i < n; i++)
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result[i] = i;
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return result;
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}
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// Produce a sequence [start..end)
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public static int[] range(int start, int end) {
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int sz = end - start;
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int[] result = new int[sz];
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for(int i = 0; i < sz; i++)
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result[i] = start + i;
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return result;
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}
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// Produce a sequence [start..end) incrementing by step
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public static int[] range(int start, int end, int step) {
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int sz = (end - start)/step;
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int[] result = new int[sz];
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for(int i = 0; i < sz; i++)
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result[i] = start + (i * step);
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return result;
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}
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}
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