DAY12：尚学堂高琪JAVA（119~123）

hashmap 与冒泡排序

MyArrayList.java

package fanxing;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
//119 实现迭代器
//120 HashMap 分拣思路
public class MyArrayList {

	public static void main(String[] args) {
		String s1=new String("this is a cat and that is a mice");
		String[] strArray=s1.split(" ");
		Map<String, Word> words =new HashMap<String, Word>();
		//为所有的key创建容器
		for(String temp:strArray){
			if (!words.containsKey(temp)) {
				words.put(temp, new Word());
			}
			else {
				Word co=words.get(temp);
				co.setCount(co.getCount()+1);
			}
		}
		Set<String> set=words.keySet();
		for(String temp:set){
			int num=words.get(temp).getCount();
			System.out.println(temp+"出的次数："+num);
		}
	}
}

word.java

package fanxing;
//120
public class Word {
	private String name;
	private int count;
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getCount() {
		return count;
	}
	public void setCount(int count) {
		this.count = count;
	}
}

冒泡排序
BubbleSort1.java

package sort;
import java.util.Arrays;
//122 冒泡
public class BubbleSort1 {
	public static void main(String[] args) {
		int[] arr = new int[5];
		arr = new int[] { 12, 9, 6, 3, 0 };
		sort(arr);
	}

	public static void sort(int[] arr) {
		for (int j = 0; j < arr.length - 1; j++) {
			boolean sorted = true;
			System.out.println("第" + (j + 1) + "趟：");
			for (int i = 0; i < arr.length - 1 - j; i++) {
				if (arr[i] > arr[i + 1]) {
					int temp = arr[i];
					arr[i] = arr[i + 1];
					arr[i + 1] = temp;
					sorted = false;
				}
				System.out.println(Arrays.toString(arr));
			}
			if (sorted) {
				break;
			}
		}
	}

}