Java访问数组中的元素 [英] Java accessing elements in an array

问题描述

我有一个String []

名为Contents的内容包含3个元素10 20 20



我想要做的是这个

内容[ 3 ] =  10   20   30  

我是java的新手



所以我想做的就是将这些元素分成单独的变量，例如

内容[ 3] .1st元素=开始

内容[3] .2nd元素=停止

内容[3] .3rd元素= Go



我尝试了什么：



我尝试了各种没有运气的东西

如

String [] test = Contents [3]

解决方案

As Java教程中的Oracle状态 [ ^ ]：

Quote：

数组是一个容器对象，它包含固定数量的单一类型的值。

  //  为10个整数分配内存 
 anArray =  new   int  [ 10 ]; 
 
  //  初始化第一个元素 
 anArray [ 0 ] =  100 ; 
  //  初始化第二个元素 
 anArray [ 1 ] =  200 ; 
  //  等等 
 anArray [ 2 ] =  300 ; 
 anArray [ 3 ] =  400 ; 
 anArray [ 4 ] =  500 ; 
 anArray [ 5 ] =  600 ; 
 anArray [ 6 ] =  700 ; 
 anArray [ 7 ] =  800 ; 
 anArray [ 8 ] =  900 ; 
 anArray [ 9 ] =  1000 ; 
 

根据以上示例：

  int  Contents =  new   int  [ 3 ]; 
目录[ 0 ] = 10; 
目录[ 1 ] = 20; 
目录[ 2 ] = 30; 
 
  int  var1 =内容[ 0 ]; 
  int  var2 =内容[ 1 ]; 
  int  var3 =内容[ 2 ]; 

拜托，开始学习。首先购买好书。

转到 Java教程 [ ^ ]，您将找到答案。

这不是学习语言的方式。

阅读文档，按照教程。

谷歌是你的朋友。

I have a String []
called Contents that contains 3 elements 10 20 20

what I'm trying to do is this

Contents[3] = 10 20 30  

I'm new to java

so what I want to do is get these elements into separate variables like
Contents[3].1st element = Start
Contents[3].2nd element = Stop
Contents[3].3rd element = Go

What I have tried:

I tried all kinds of stuff with no luck
such as
String [] test = Contents[3]

解决方案

As Oracle states in Java tutorial[^]:

Quote:

An array is a container object that holds a fixed number of values of a single type.

// allocates memory for 10 integers
anArray = new int[10];

// initialize first element
anArray[0] = 100;
// initialize second element
anArray[1] = 200;
// and so forth
anArray[2] = 300;
anArray[3] = 400;
anArray[4] = 500;
anArray[5] = 600;
anArray[6] = 700;
anArray[7] = 800;
anArray[8] = 900;
anArray[9] = 1000;

According to above example:

int Contents = new int[3];
Contents[0]=10;
Contents[1]=20;
Contents[2]=30;

int var1 = Contents[0];
int var2 = Contents[1];
int var3 = Contents[2];

Please, get down to study. Start by buying good book.

Go to The Java Tutorials[^] and you will find the answers.

This is not the way one learn a language.
Read documentation, follow tutorials.
Google is your friend.

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