arraysdemo.java

来自「Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想」· Java 代码 · 共 39 行

package chapter8;

import java.util.*;

class ArraysDemo
{
    public static void main(String args[])
    {
        // 分配并初始化数组
        int array[] = new int[10];
        for(int i = 0; i < 10; i++)
            array[i] = -3 * i;
        // 显示，排序，再显示
        System.out.print("Original contents: ");
        display(array);
        Arrays.sort(array);
        System.out.print("Sorted: ");
        display(array);
        // 填充并显示
        Arrays.fill(array, 2, 6, -1);
        System.out.print("After fill(): ");
        display(array);
        // 排序并显示
        Arrays.sort(array);
        System.out.print("After sorting again: ");
        display(array);
        // 二进制查找”-9”
        System.out.print("The value -9 is at location ");
        int index = Arrays.binarySearch(array, -9);
        System.out.println(index);
    }

    static void display(int array[])
    {
        for(int i = 0; i < array.length; i++)
            System.out.print(array[i] + " ");
        System.out.println("");
    }
}