过三关 Java冒泡排序选择排序插入排序小练习

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

//功能：猴子排序
public class MonkeySelect {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        // 定义一个可以装5只猴子的对象数组
        int size = 5;
        Monkey[] monkeys = new Monkey[size];

        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);
        // 初始化各个猴子
        for (int i = 0; i < monkeys.length; i++) {
            System.out.println("请输入第" + (i + 1) + "只猴子的高度");

            try {
                String height = br.readLine();
                monkeys[i] = new Monkey((i + 1) + "", Float.parseFloat(height));
            } catch (NumberFormatException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        // 让老猴子排序
        Monkey oldMonkey = new Monkey("1000", 1.2f);
        // 冒泡排序
        oldMonkey.bubbleSort(monkeys);

        // oldMonkey.selectSort(monkeys);选择排序调用
        // oldMonkey.insertSort(monkeys);插入排序调用

        // 验证
        oldMonkey.show(monkeys);
    }
}

// 猴子
class Monkey {
    private String monkeyId;
    private float height;

    public Monkey(String monkeyId, float height) {
        this.monkeyId = monkeyId;
        this.height = height;
    }

    // 插入排序
    public void insertSort(Monkey[] monkeys) {
        // 开始排序
        for (int i = 0; i < monkeys.length; i++) {
            // 先记录该猴子的身高
            float insertHeight = monkeys[i].height;
            String insertNo = monkeys[i].monkeyId;
            int insertIndex = i - 1;

            while (insertIndex >= 0
                    && monkeys[insertIndex].height > insertHeight) {
                monkeys[insertIndex + 1].height = monkeys[insertIndex].height;
                monkeys[insertIndex + 1].monkeyId = monkeys[insertIndex].monkeyId;
                insertIndex--;
            }
            // 插入
            monkeys[insertIndex + 1].height = insertHeight;
            monkeys[insertIndex + 1].monkeyId = insertNo;
        }
    }

    // 选择排序
    public void selectSort(Monkey[] monkeys) {
        float tempHeight = 0.0f;
        String tempNo = "";
        for (int i = 0; i < monkeys.length; i++) {

            float minHeight = monkeys[i].height;
            int minIndex = i;

            // 和后面的比较
            for (int j = i + 1; j < monkeys.length; j++) {
                if (minHeight > monkeys[j].height) {
                    // 修正一下最小值
                    minHeight = monkeys[j].height;
                    // 修正下标
                    minIndex = j;
                }
            }
            if (minIndex != i) {
                // 交换
                tempHeight = monkeys[minIndex].height;
                monkeys[minIndex].height = monkeys[i].height;
                monkeys[i].height = tempHeight;

                tempNo = monkeys[minIndex].monkeyId;
                monkeys[minIndex].monkeyId = monkeys[i].monkeyId;
                monkeys[i].monkeyId = tempNo;
            }
        }
    }

    // 冒泡排队
    public void bubbleSort(Monkey[] monkeys) {
        float tempHeight = 0.0f;
        String tempNo = "";

        // 冒泡
        for (int i = 0; i < monkeys.length - 1; i++) {
            for (int j = 0; j < monkeys.length - 1 - i; j++) {
                // 判断
                if (monkeys[j].height > monkeys[j + 1].height) {
                    // 身高
                    tempHeight = monkeys[j].height;
                    monkeys[j].height = monkeys[j + 1].height;
                    monkeys[j + 1].height = tempHeight;
                    // 编号
                    tempNo = monkeys[j].monkeyId;
                    monkeys[j].monkeyId = monkeys[j + 1].monkeyId;
                    monkeys[j + 1].monkeyId = tempNo;

                }
            }
        }

    }

    // 显示队列
    public void show(Monkey[] monkeys) {
        for (int i = 0; i < monkeys.length; i++) {
            System.out.println("猴子编号：" + monkeys[i].monkeyId + " 身高："
                    + monkeys[i].height);
        }
    }
}