blocks|key|756664|text|你可以使用例如r.nextInt(101)|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|756665|对于更通用的“在两个数字之间”，请使用：|756666|Random+r+=+new+Random();
int+low+=+10;
int+high+=+100;
int+result+=+r.nextInt(high-low)+%2B+low;|code-block|syntax|javascript|756667|这给出了一个介于10+(含)和100+(不含)之间的随机数|756668|entityMap^0|7|E|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|V|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

You could use e.g. <code>r.nextInt(101)</code>

For a more generic "in between two numbers" use:

<pre><code>Random r = new Random();
int low = 10;
int high = 100;
int result = r.nextInt(high-low) + low;
</code></pre>

This gives you a random number in between 10 (inclusive) and 100 (exclusive)

blocks|key|972357|text|假设上界是上界，下界是下界，那么您可以使用以下命令在这两个界之间生成一个随机数r：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972358|int+r+=+(int)+(Math.random()+*+(upper+-+lower))+%2B+lower;|code-block|syntax|javascript|972359|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|$]]

Assuming the upper is the upper bound and lower is the lower bound, then you can make a random number, r, between the two bounds with:

<pre><code>int r = (int) (Math.random() * (upper - lower)) + lower;
</code></pre>

blocks|key|972251|text|int+Random+=+(int)(Math.random()*100);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|972252|如果需要生成多个值，那么只需使用for循环即可|unstyled|972253|+for+(int+i+=+1;+i+<=+10+;+i%2B%2B)
+++++++{
++++++++int+Random+=+(int)(Math.random()*100);
++++++++System.out.println(Random);
+++++++}|972254|如果你想指定一个更合适的范围，比如从10到100+(两者都在这个范围内)|972255|所以代码应该是：|972256|+++int+Random+=10+%2B++(int)(Math.random()*(91));
+++/*+int+Random+=+(min.value+)+%2B+(int)(Math.random()*+(+Max+-+Min+%2B+1));
++*Where+min+is+the+smallest+value+You+want+to+be+the+smallest+number+possible+to+++++++
++generate+and+Max+is+the+biggest+possible+number+to+generate*/|972257|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|R|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$B|C]]|$1|O|3|-4|5|F|7|W|8|@]|9|@]|A|$]]]|P|$]]

<pre><code>int Random = (int)(Math.random()*100);
</code></pre>

if You need to generate more than one value, then just use 
for loop for that

<pre><code> for (int i = 1; i &lt;= 10 ; i++)
 {
 int Random = (int)(Math.random()*100);
 System.out.println(Random);
 }
</code></pre>

If You want to specify a more decent range, like from 10 to 100 ( both are in the range ) 

so the code would be :

<pre><code> int Random =10 + (int)(Math.random()*(91));
 /* int Random = (min.value ) + (int)(Math.random()* ( Max - Min + 1));
 *Where min is the smallest value You want to be the smallest number possible to 
 generate and Max is the biggest possible number to generate*/
</code></pre>

blocks|key|972364|text|像这样，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972365|Random+random+=+new+Random();
int+randomNumber+=+random.nextInt(upperBound+-+lowerBound)+%2B+lowerBound;|code-block|syntax|javascript|972366|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|$]]

Like this,

<pre><code>Random random = new Random();
int randomNumber = random.nextInt(upperBound - lowerBound) + lowerBound;
</code></pre>

blocks|key|972213|text|使用Random.nextInt(int)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|972214|在您的示例中，它将如下所示：|972215|a[i][j]+=+r.nextInt(101);|code-block|syntax|javascript|972216|entityMap|0|LINK|mutability|MUTABLE|url|http://download.oracle.com/javase/6/docs/api/java/util/Random.html#nextInt%2528int%2529^0|2|J|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@]|C|$I|J]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]]]

Use <a href="http://download.oracle.com/javase/6/docs/api/java/util/Random.html#nextInt%28int%29" rel="nofollow">Random.nextInt(int)</a>.

In your case it would look something like this:

<pre><code>a[i][j] = r.nextInt(101);
</code></pre>

blocks|key|972288|text|Java没有像Python那样在两个值之间使用随机生成器。实际上，它只需要一个值就可以生成随机数。然后，您需要做的是在生成的数字上添加一个特定的数字，这将导致该数字在一个范围内。例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972289|package+RandGen;

import+java.util.Random;

public+class+RandGen+{


++++public+static+Random+numGen+=new+Random();

public+static+int+RandNum(){
++++int+rand+=+Math.abs((100)%2BnumGen.nextInt(100));

++++return+rand;
}

public+static+void+main(String[]Args){
+++System.out.println(RandNum());
}|code-block|syntax|javascript|972290|}|972291|这个程序的函数完全在第6行(以"int+rand...“开头的那一行。请注意，Math.abs()只是将数字转换为绝对值，并且它被声明为一个整数，这并不重要。第一个(100)是我要加到随机数上的数字。这意味着新的输出数将是随机数%2B+100。numGen.nextInt()是随机数本身的值，因为我将(+100+)放在它的括号中，所以它是1到100之间的任何数字。所以当我加100的时候，它变成了一个介于101和200之间的数字。实际上，您生成的不是100到200之间的数字，而是1到100之间的数字。|972292|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|$]]

Java doesn't have a Random generator between two values in the same way that Python does. It actually only takes one value in to generate the Random. What you need to do, then, is add ONE CERTAIN NUMBER to the number generated, which will cause the number to be within a range. For instance:

<pre><code>package RandGen;

import java.util.Random;

public class RandGen {


 public static Random numGen =new Random();

public static int RandNum(){
 int rand = Math.abs((100)+numGen.nextInt(100));

 return rand;
}

public static void main(String[]Args){
 System.out.println(RandNum());
}
</code></pre>

}

This program's function lies entirely in line 6 (The one beginning with "int rand...". Note that Math.abs() simply converts the number to absolute value, and it's declared as an int, that's not really important. The first (100) is the number I am ADDING to the random one. This means that the new output number will be the random number + 100. numGen.nextInt() is the value of the random number itself, and because I put (100) in its parentheses, it is any number between 1 and 100. So when I add 100, it becomes a number between 101 and 200. You aren't actually GENERATING a number between 100 and 200, you are adding to the one between 1 and 100.

blocks|key|972313|text|你也可以在下面尝试一下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|972314|public+class+RandomInt+{+
++++public+static+void+main(String[]+args)+{+

++++++++int+n1+=+Integer.parseInt(args[0]);
++++++++int+n2+=+Integer.parseInt(args[1]);
++++++++double+Random;

++++++++if+(n1+!=+n2)
++++++++{
++++++++++++if+(n1+>+n2)
++++++++++++{
++++++++++++++++Random+=+n2+%2B+(Math.random()+*+(n1+-+n2));
++++++++++++++++System.out.println("Your+random+number+is:+"+%2B+Random);
++++++++++++}
++++++++++++else
++++++++++++{
++++++++++++++++Random+=+n1+%2B+(Math.random()+*+(n2+-+n1));+++
++++++++++++++++System.out.println("Your+random+number+is:+"+%2BRandom);
++++++++++++}
++++++++}+else+{
++++++++++++System.out.println("Please+provide+valid+Range+"+%2Bn1%2B+"+"+%2Bn2%2B+"+are+equal+numbers."+);
++++++++}+++++++++++++++++++++
++++}
}|code-block|syntax|javascript|972315|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|$]]

One can also try below:

<pre><code>public class RandomInt { 
 public static void main(String[] args) { 

 int n1 = Integer.parseInt(args[0]);
 int n2 = Integer.parseInt(args[1]);
 double Random;

 if (n1 != n2)
 {
 if (n1 &gt; n2)
 {
 Random = n2 + (Math.random() * (n1 - n2));
 System.out.println("Your random number is: " + Random);
 }
 else
 {
 Random = n1 + (Math.random() * (n2 - n1)); 
 System.out.println("Your random number is: " +Random);
 }
 } else {
 System.out.println("Please provide valid Range " +n1+ " " +n2+ " are equal numbers." );
 } 
 }
}
</code></pre>

I would like to know how to generate a random number between two given values.

I am able to generate a random number with the following:

<pre><code>Random r = new Random();

for(int i = 0; i &lt; a.length; i++){
 for(int j = 0; j &lt; a[i].length; j++){
 a[i][j] = r.nextInt();
 }

}
</code></pre>

However, how can I generate a random number between 0 and 100 (inclusive)?

Java Generate Random Number Between Two Given Values

Python

Java

我想知道如何在两个给定值之间生成一个随机数。我可以生成一个包含以下内容的随机数：Random r = new Random();for(int i = 0; i < a.length; i++){ for(int j = 0; j < a[i].length; j++){ a[i][j] = r.nextInt(); }}但是，如何生成0到100 (含)之间的随机数呢？

问Java生成两个给定值之间的随机数
EN

回答 7

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问Java生成两个给定值之间的随机数EN

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