如何在 Java 中将句子转换为整数？

Question

如果我有两个句子，例如）“我是男孩。” “我是学生。”

如何将它们更改为整数，然后编写代码来搜索并计算重复出现的单词？

Ex) 有两个“I”，有两个“am”，有两个“a”

public class StringEx {

    public static void main(String[] args) {
        String text = "I am a boy";
        String text2 = " I went to the store to buy a bag of potato";
        
        String[] temp = text.split(" ");
        System.out.println(temp.length);
        for (int i = 0; i < temp.length; i++) {
            System.out.println(temp[i] + "");
        }
        int nText = Integer.parseInt(temp); //I don't know what do here
        System.out.println(nText); 
    }