How to randomly generate random integers in java

To randomly generate integers in Java, you can use the java.util.Random class: nextInt(int bound): generate a random integer in the range of [0, bound) nextInt(): generate [-2^31, 2^ 31) Random integers within the range

Randomly generate random integers in Java

Generating random integers in Java can Use the java.util.Random class, which provides the following methods:

<code class="java">int nextInt(int bound): 生成 [0, bound) 范围内的随机整数
int nextInt(): 生成 [-2^31, 2^31) 范围内的随机整数</code>

Example:

Generate a random integer between 0 and 99 :

<code class="java">Random random = new Random();
int randomNumber = random.nextInt(100);</code>

Generate a random integer between 10 and 100:

<code class="java">int randomNumber = random.nextInt(91) + 10; // 101 - 100 = 91</code>

Notes:

• nextInt(int bound ) The range of random numbers generated by the method is a closed interval, while the range of random numbers generated by the nextInt() method is an open interval.
• For the same Random instance, calling the nextInt() method multiple times will produce a seemingly random but actually deterministic sequence. Therefore, it is recommended to use the SecureRandom class when truly random numbers are required.

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