键盘输入一个数number，输出从1到number的所有奇数和偶数

 1 package com.company;
 2 
 3 import java.util.ArrayList;
 4 import java.util.HashMap;
 5 import java.util.List;
 6 import java.util.Map;
 7 import java.util.Scanner;
 8 
 9 public class Test3 {
10 
11     private int total;
12     private int even = 0;
13     private int odd = 0;
14 
15     public void getNumber(int number) {
16         Map map = new HashMap();
17         List list1 = new ArrayList();
18         List list2 = new ArrayList();
19 
20         for (int i = 0; i <= number; i++) {
21             if (i % 2 == 0) {
22                 //even = even + i;
23                 list1.add(i);
24             } else {
25                 //odd = odd + i;
26                 list2.add(i);
27             }
28         }
29         System.out.println("1-" + number + "范围之间的偶数有：" + list1.toString() + "偶数和为：" + even);
30         System.out.println("1-" + number + "范围之间的奇数有：" + list2.toString() + "奇数和为：" + odd);
31 
32     }
33 
34     public static void main(String[] args) {
35         Scanner sc = new Scanner(System.in);
36         System.out.println("请输入一个整数：");
37         int number = sc.nextInt();
38         long starttime = System.currentTimeMillis();
39         Test3 t = new Test3();
40         t.getNumber(number);
41         long endtime = System.currentTimeMillis();
42         System.out.println("运行时间：" + (endtime - starttime) + "ms");
43     }
44 }

package com.company;

import java.util.ArrayList;
import java.util.Scanner;
public class Test4 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个数：");
        int number=sc.nextInt();
        ArrayList list1  = new ArrayList();
        ArrayList list2  = new ArrayList();
        //int[] a =new int[number];
        long starttime = System.currentTimeMillis();
            for (int i = 0; i < number; i++) {
                if((i&1)==1){
                    list1.add(i);
                  
                }else{
                    list2.add(i);
                }
            }
        System.out.println("奇数！"+list1.toString()+"\n"+"偶数！"+list2.toString());    
        long endtime = System.currentTimeMillis();
        System.out.println("运行时间："+(endtime-starttime)+"ms");
    }
}

package com.company;

import java.util.Scanner;

public class Test5 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个数：");
        int number = sc.nextInt();
        StringBuilder s1 = new StringBuilder();
        StringBuilder s2 = new StringBuilder();
        long starttime = System.currentTimeMillis();
        for (int i = 0; i < number; i += 2) {
            s1.append(i).append(",");
            s2.append(i+1).append(",");
        }
        System.out.println("奇数是："+s1);
        System.out.println("偶数是："+s2);
        long endtime = System.currentTimeMillis();
        System.out.println("运行时间："+(endtime-starttime)+"ms");
    }
}