Java GUI visualization example analysis

Question: There are 100 people in the room, each of them has 100 yuan, and they are playing a game. In each round of the game, everyone has to give one dollar to another person randomly. What is the wealth distribution of these 100 people in the end? Guess, after 10,000 exchanges, what do you think the final result will be like?

The answer is like this.

Is it different from your intuitive idea? Did you think it was evenly distributed at first?

In fact, many people did not expect the result to be like this at the beginning.

We use Java GUI to visually understand this problem.

First initialize the data. At the beginning, everyone has 100 yuan.

<code>   // 初始化数据<br>   money = new int[100];<br>   for(int i = 0 ; i < money.length ; i ++)<br/>       money[i] = 100;</code>

Initial state

Then in each round of the game, everyone must

take out one dollar and give it to another person randomly

,

<code> for(int i = 0 ; i < money.length; i ++){<br/>      if(money[i] > 0){<br>          int j = (int)(Math.random() * money.length);<br>          money[i] -= 1;<br>          money[j] += 1;<br>       }<br>  }<br></code>

Not intuitive enough? Then we can sort first and then display.

<code>Arrays.sort(money);<br>for(int i = 0 ; i < money.length; i ++){<br/>      if(money[i] > 0){<br>          int j = (int)(Math.random() * money.length);<br>          money[i] -= 1;<br>          money[j] += 1;<br>       }<br>  }</code>

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