blocks|key|845872|text|每个对象都有一个toString()方法，默认方法是先显示对象的类名表示，然后显示@，然后显示对象的哈希码。因此，您看到的是int数组的默认toString()表示。要打印数组中的数据，可以使用：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|845873|System.out.println(java.util.Arrays.toString(arr));|code-block|syntax|javascript|845874|或者，您可以像其他人在此线程中发布的那样，使用for循环遍历数组。|845875|entityMap^0|8|A|15|1|1Q|3|1Y|A|0|0|N|3|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|N|$]]

Every object has a <code>toString()</code> method, and the default method is to display the object's class name representation, then <code>@</code> followed by its hashcode. So what you're seeing is the default <code>toString()</code> representation of an <code>int</code> array. To print the data in the array, you can use:

<pre><code>System.out.println(java.util.Arrays.toString(arr));
</code></pre>

Or, you can loop through the array with a <code>for</code> loop as others have posted in this thread.

blocks|key|1060222|text|它是数组(奇怪的文本)的默认字符串表示。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1060223|你只需要遍历它：|1060224|for(int+i+:+arr){
System.out.println(i);
}|code-block|syntax|javascript|1060225|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

It's the default string representation of array (the weird text).

You'll just have to loop through it:

<pre><code>for(int i : arr){
System.out.println(i);
}
</code></pre>

blocks|key|1060293|text|要打印值，请使用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1060294|for(int+i=0;+i<arr.length;+i%2B%2B)
+++System.out.println(arr[i]);|code-block|syntax|javascript|1060295|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|$]]

To print the values use.

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

blocks|key|845804|text|如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|845805|for+(int+i+=+0;+i+<+arr.length;+%2B%2Bi)
{
++++System.out.println(arr[i]);
}|code-block|syntax|javascript|845806|这个“奇怪的数字”是您打印出的数组的引用。这是内置于java.lang.Object+toString()方法中的默认行为。|845807|如果仅看到引用还不够，就应该在自己的对象中重写它。|845808|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]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Like this: 

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

That "weird number" is the reference for the array you printed out. It's the default behavior built into the java.lang.Object toString() method. 

You should override it in your own objects if seeing the reference isn't sufficient.

blocks|key|845942|text|它打印它的.toString()方法，您应该打印每个元素|type|unstyled|depth|inlineStyleRanges|entityRanges|data|845943|for(int+i=0;+i<arr.length;+i%2B%2B)+{
+++System.out.println(arr[i]);
}

or

for(Integer+i+:+arr)+{
++System.out.println(i);
}|code-block|syntax|javascript|845944|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|$]]

It prints it's .toString() method you should print each element

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

or

for(Integer i : arr) {
 System.out.println(i);
}
</code></pre>

blocks|key|845968|text|顺便说一句，你可以写|type|unstyled|depth|inlineStyleRanges|entityRanges|data|845969|int[]+arr+=+{+20,+40,+60,+40,+60,+100+};
System.out.println(Arrays.toString(array));|code-block|syntax|javascript|845970|甚至是|845971|System.out.println(Arrays.toString(new+int[]+{+20,+40,+60,+40,+60,+100+}));|845972|或|845973|System.out.println(Arrays.asList(20,+40,+60,+40,+60,+100));|845974|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

BTW You can write

<pre><code>int[] arr = { 20, 40, 60, 40, 60, 100 };
System.out.println(Arrays.toString(array));
</code></pre>

or even

<pre><code>System.out.println(Arrays.toString(new int[] { 20, 40, 60, 40, 60, 100 }));
</code></pre>

or

<pre><code>System.out.println(Arrays.asList(20, 40, 60, 40, 60, 100));
</code></pre>

blocks|key|1060367|text|for+(int+i+=+0;+i+<+arr.length;+%2B%2Bi)
{
++System.out.println(arr[i]);
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1060368|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

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

blocks|key|845995|text|我的版本更短！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|845996|使用Arrays.toString()和PrintStream.printf(String+format,+Object...+args)。|offset|length|845997|System.out.printf("%25s%25n",+Arrays.toString(arr));|code-block|syntax|javascript|845998|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/java/util/Arrays.html#toString(double[])|1|http://developer.android.com/reference/java/io/PrintStream.html#printf%2528java.lang.String,%2520java.lang.Object...%2529^0|0|2|H|0|K|1D|1|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@$D|W|E|X|1|Y]|$D|Z|E|10|1|11]]|A|$]]|$1|F|3|G|5|H|7|12|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]|S|$5|N|O|P|A|$Q|T]]]]

<h1>My version of a shorter!</h1>
Use <a href="http://developer.android.com/reference/java/util/Arrays.html#toString(double%5B%5D)" rel="nofollow noreferrer">Arrays.toString()</a> and <a href="http://developer.android.com/reference/java/io/PrintStream.html#printf%28java.lang.String,%20java.lang.Object...%29" rel="nofollow noreferrer">PrintStream.printf(String format, Object... args)</a>.
<pre><code>System.out.printf(&quot;%s%n&quot;, Arrays.toString(arr));
</code></pre>

blocks|key|1060358|text|您打印的是引用，而不是引用的值...总有一天，C语言会让一切变得清晰起来。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1060359|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You printed the reference and not the values at the reference... One day it will all become clear with C.

I'm new to programming. I'm sure the answer for this question is out there, but I have no idea what to search for. 

Ok, I'll go right to it.

Here's my code: 

<pre><code>int[] arr;
arr = new int[5];

arr[0] = 20;
arr[1] = 50;
arr[2] = 40;
arr[3] = 60;
arr[4] = 100;

System.out.println(arr);
</code></pre>

This compiles and works fine. It's just the output from CMD that I'm dizzy about. 

This is the output: <code>[I@3e25a5</code>.

I want the output to represent the exact same numbers from the list (<code>arr</code>) instead. How do I make that happen?

Java arrays printing out weird numbers and text

我是编程新手。我确信这个问题的答案就在那里，但我不知道要搜索什么。好的，我就直奔主题吧。下面是我的代码：int[] arr;arr = new int[5];arr[0] = 20;arr[1] = 50;arr[2] = 40;arr[3] = 60;arr[4] = 100;System.out.println(arr);这段代码可以很好地编译和运行。我只是对CMD的输出感到头晕目眩。这是输出

问Java数组打印出奇怪的数字和文本
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回答 9

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