集册 Java实例教程 从左到右反转数组。

从左到右反转数组。

欢马劈雪     最近更新时间:2020-01-02 10:19:05

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从左到右反转数组。


//package com.nowjava;/* 来自 nowjava.com - 时代Java*/


public class Main {

    public static void main(String[] argv) throws Exception {

        double[] v = new double[] { 34.45, 35.45, 36.67, 37.78, 37.0000,

                37.1234, 67.2344, 68.34534, 69.87700 };

        System.out.println(java.util.Arrays.toString(invert(v)));

    }


    /**

     * Inverts an array from left to right.

     */

    public static double[] invert(double[] v) {

        double[] w = new double[v.length];

        for (int k = 0; k < v.length; k++) {

            w[v.length - 1 - k] = v[k];

        }

        return (w);

    }


    /**

     * Inverts an array from left to right.

     */

    public static int[] invert(int[] v) {

        int[] w = new int[v.length];
        /*
        NowJava.com 提 供
        */

        for (int k = 0; k < v.length; k++) {

            w[v.length - 1 - k] = v[k];

        }

        return (w);

    }


    /**

     * Returns a comma delimited string representing the value of the array.

     */

    public static String toString(double[] array) {


        StringBuffer buf = new StringBuffer(array.length);

        int i;

        for (i = 0; i < array.length - 1; i++) {

            buf.append(array[i]);

            buf.append(',');

        }

        buf.append(array[i]);

        return buf.toString();

    }


    /**

     * Returns a comma delimited string representing the value of the array.

     */

    public static String toString(double[][] array) {

        StringBuffer buf = new StringBuffer();

        for (int k = 0; k < array.length; k++) {

            buf.append(toString(array[k]));

            buf.append(System.getProperty("line.separator"));

        }

        return buf.toString();

    }


    /**

     * Returns a comma delimited string representing the value of the array.

     */

    public static String toString(int[] array) {

        StringBuffer buf = new StringBuffer(array.length);

        int i;

        for (i = 0; i < array.length - 1; i++) {

            buf.append(array[i]);

            buf.append(',');

        }

        buf.append(array[i]);

        return buf.toString()
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