Today, I learned the Java array, which is similar to the list List in python. However, the difference is that the array Array needs to define the data type, can only store a single data type, and needs to define the storage length. List List can store a variety of data types, no need to define the storage length in advance. Below I have made a few small examples to share with you.
First, create a new Array.java file, and then add the following code to the Java file.
import java.util.*;
/**
* 数组Array的例子
* @author Mr.Pan_学狂
* created time by 2021-2-28
*/
public class Array{
public static void main(String[] args) {
//定义一个存储字符串的数组names，将数组元素写进去。
String[] names = new String[] {
"Jack","Mr.Pan_学狂","Mr.Jackel","Ms.Amy"};
int Length = names.length;//获取数组的长度
for(int i = 0;i < Length;i++) {
System.out.println(names[i]);//打印数组中的每一个元素
}
test1();
}
public static void test1() {
//定义一个整形数组number，定义number的存储长度为5
int[] number = new int[5];
int Length = number.length;//获取number数组的长度
for(int i = 0;i < Length;i++) {
number[i] = i+1;//当索引是0的时候值是1，以此类推。
}
String[] name = new String[] {
"Jack","Peter","Mark","Ben","Amy"};
System.out.println("候选人名单如下：");
System.out.println("---------");//美观设计
for(int i = 0;i < Length;i++) {
if(i == 0) {
System.out.println("|"+number[i]+"."+name[i]+" |");
}
else if(i == 1) {
System.out.println("|"+number[i]+"."+name[i]+"|");
}
else if(i == 2) {
System.out.println("|"+number[i]+"."+name[i]+" |");
}
else if(i == 3) {
System.out.println("|"+number[i]+"."+name[i]+" |");
}
}
System.out.println("---------"+"\n");//加入\n的换行符
System.out.println("请输入你的年龄:");
Scanner impt = new Scanner(System.in);
int age = impt.nextInt();
if(age < 18) {
System.out.println("未满18岁，不符合选举条件");
}
else if (age >= 18) {
System.out.println("您现在有一票，请投票！");
int select = impt.nextInt();
int Index = select - 1;//创建数组对应的索引，将数组中的元素索引到。
if(select == 1) {
System.out.println("谢谢你，为"+name[Index]+"投了一票！");
}
else if(select == 2) {
System.out.println("谢谢你，为"+name[Index]+"投了一票！");
}
else if(select == 3) {
System.out.println("谢谢你，为"+name[Index]+"投了一票！");
}
else if(select == 4) {
System.out.println("谢谢你，为"+name[Index]+"投了一票！");
}
}
}
}
The results of the operation are as follows:
Finally, thank you all for coming to watch my article. There may be many improprieties in the article, and I hope to point out Hehaihan.