Insertion

简书 賈小強
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package com.lab1.test2;

public class Insertion {
    public static void main(String[] args) {
        Comparable[] a = { 5, 3, 1, 2, 4 };
        sort(a);
        show(a);
    }

    private static void show(Comparable[] a) {
        for (int i = 0; i < a.length; i++) {
            System.out.print(a[i] + " ");
        }
    }

    private static void sort(Comparable[] a) {
        for (int i = 0; i < a.length; i++) {
            for (int j = i; j > 0 && less(a, j, j - 1); j--) {
                exch(a, j - 1, j);
            }
        }
    }

    private static void exch(Comparable[] a, int i, int j) {
        Comparable temp = a[i];
        a[i] = a[j];
        a[j] = temp;
    }

    private static boolean less(Comparable[] a, int i, int j) {
        return a[i].compareTo(a[j]) < 0;
    }
}

输出

1 2 3 4 5 

Happy learning !!