blocks|key|1319854|text|for(int+i+=+0;+i+<+array.length;+i%2B%2B)
{
++++System.out.println(array[i]);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1319855|或|unstyled|1319856|for(String+value+:+array)
{
++++System.out.println(value);
}|1319857|第二个版本是"for-each“循环，它处理数组和集合。大多数循环都可以使用for-each循环来完成，因为您可能并不关心实际的索引。如果你真的关心实际的索引，我们先看第一个版本。|1319858|为了完整起见，你可以这样做while循环：|1319859|int+index+=+0;

while(index+<+myArray.length)
{
++final+String+value;

++value+=+myArray[index];
++System.out.println(value);
++index%2B%2B;
}|1319860|但是当你知道循环的大小时，你应该使用for循环而不是while循环(即使使用可变长度的数组，你也知道它的大小……它只是每次都不同而已)。|1319861|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$B|C]]|$1|O|3|P|5|F|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|F|7|Z|8|@]|9|@]|A|$]]]|R|$]]

<pre><code>for(int i = 0; i &lt; array.length; i++)
{
 System.out.println(array[i]);
}
</code></pre>

or

<pre><code>for(String value : array)
{
 System.out.println(value);
}
</code></pre>

The second version is a "for-each" loop and it works with arrays and Collections. Most loops can be done with the for-each loop because you probably don't care about the actual index. If you do care about the actual index us the first version.

Just for completeness you can do the while loop this way:

<pre><code>int index = 0;

while(index &lt; myArray.length)
{
 final String value;

 value = myArray[index];
 System.out.println(value);
 index++;
}
</code></pre>

But you should use a for loop instead of a while loop when you know the size (and even with a variable length array you know the size... it is just different each time).

blocks|key|1319902|text|数组有一个隐式成员变量来保存长度：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1319903|for(int+i=0;+i<myArray.length;+i%2B%2B)+{
++++System.out.println(myArray[i]);
}|code-block|syntax|javascript|1319904|或者，如果使用>=java5，则使用for+each循环：|1319905|for(Object+o+:+myArray)+{
++++System.out.println(o);
}|1319906|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Arrays have an implicit member variable holding the length:

<pre><code>for(int i=0; i&lt;myArray.length; i++) {
 System.out.println(myArray[i]);
}
</code></pre>

Alternatively if using >=java5, use a for each loop:

<pre><code>for(Object o : myArray) {
 System.out.println(o);
}
</code></pre>

blocks|key|1104993|text|下面是一个示例，其中数组的长度在循环执行期间被更改|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1104994|import+java.util.ArrayList;
public+class+VariableArrayLengthLoop+{

public+static+void+main(String[]+args)+{

++++//create+new+ArrayList
++++ArrayList<String>+aListFruits+=+new+ArrayList<String>();

++++//add+objects+to+ArrayList
++++aListFruits.add("Apple");
++++aListFruits.add("Banana");
++++aListFruits.add("Orange");
++++aListFruits.add("Strawberry");

++++//iterate+ArrayList+using+for+loop
++++for(int+i+=+0;+i+<+aListFruits.size();+i%2B%2B){

++++++++System.out.println(+aListFruits.get(i)+%2B+"+i+=+"%2Bi+);
+++++++++if+(+i+==+2+)+{
++++++++++++++++aListFruits.add("Pineapple");++
++++++++++++++++System.out.println(+"added+now+a+Fruit+to+the+List+");+
++++++++++++++++}
++++++++}
++++}
}|code-block|syntax|javascript|1104995|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

here is an example, where the length of the array is changed during execution of the loop

<pre><code>import java.util.ArrayList;
public class VariableArrayLengthLoop {

public static void main(String[] args) {

 //create new ArrayList
 ArrayList&lt;String&gt; aListFruits = new ArrayList&lt;String&gt;();

 //add objects to ArrayList
 aListFruits.add("Apple");
 aListFruits.add("Banana");
 aListFruits.add("Orange");
 aListFruits.add("Strawberry");

 //iterate ArrayList using for loop
 for(int i = 0; i &lt; aListFruits.size(); i++){

 System.out.println( aListFruits.get(i) + " i = "+i );
 if ( i == 2 ) {
 aListFruits.add("Pineapple"); 
 System.out.println( "added now a Fruit to the List "); 
 }
 }
 }
}
</code></pre>

How do I iterate over a Java array of variable length. 

I guess I would setup a while loop, but how would I detect that I have reached the end of the array.

I guess I want something like this [just need to figure out how to represent myArray.notEndofArray()]

<pre><code>index = 0;
while(myArray.notEndofArray()){
 system.out.println(myArray(index));
 index++;
}
</code></pre>

Iterating through a variable length array

Java

如何遍历长度可变的Java数组？我想我会设置一个while循环，但是我如何检测我已经到达了数组的末尾呢？我想我想要这样的东西，只是需要弄清楚如何表示myArray.notEndofArray()index = 0;while(myArray.notEndofArray()){  system.out.println(m...

问遍历可变长度数组
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