31 lines
945 B
Java
31 lines
945 B
Java
// onjava/Range.java
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// (c)2021 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://OnJava8.com for more book information.
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// Create arrays initialized with integer values.
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package onjava;
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public class Range {
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// Produce sequence [start..end) incrementing by step
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public static
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int[] range(int start, int end, int step) {
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if(step == 0)
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throw new
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IllegalArgumentException("Step cannot be zero");
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int sz = Math.max(0, step >= 0 ?
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(end + step - 1 - start) / step
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: (end + step + 1 - 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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} // Produce a sequence [start..end)
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public static int[] range(int start, int end) {
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return range(start, end, 1);
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}
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// Produce a sequence [0..n)
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public static int[] range(int n) {
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return range(0, n);
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}
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}
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