如何指定随机数的范围? [英] How can I specify the range of a random number?

问题描述

我有随机插入数字的二叉搜索树代码.每次都可以修改大小，但我想修改数字的范围，例如:我希望随机数只有一位或两位.

I have binary search tree code that inserts numbers randomly. I can modify size each time, but I want to modify the range of numbers, for example: I want the random number be just one digit or just 2 digits.

我该怎么做?

public static void main( String[ ] args ) {

    BinarySearchTree bst = new BinarySearchTree( );
    Random random = new Random( System.currentTimeMillis() );
    int[] randoms = new int[1000];
    Random randGen = new Random();

    for(int i = 0; i < randoms.length; i++)
    {
        bst.insert( random.nextInt( randoms.length ) );
    }

    System.out.println( "
 sorted :" );

    bst.inorderTraversal( );
    bst.delete (4);

    System.out.println( "
Max Value:" ); 
    System.out.println(bst.maxValue());
    System.out.println( "
 Min Value:" );
    System.out.println(bst.minValue());

    System.out.println(bst.lookup(1));
}

推荐答案

怎么样:

• 只有一位数

• just one digit

random.nextInt(10)

只有两位数

just 2 digits

random.nextInt(90) + 10

还是我误解了你的问题?

Or did I misunderstand your question?

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