标签:JAVA AppData image typora 走神 images 听课 hp png
## 1.5方法详解
### 1.5.1什么是方法
![image-20210208025844038](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208025844038.png)
main方法应该尽量简洁
### 1.5.2方法的定义和调用
![image-20210208032455426](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208032455426.png)
```java
package DAY3;
public class 比大小 {
public static void main(String[] args) {
int max = max(10, 20);
System.out.println(max);
}
//比大小
public static int max(int num1,int num2){
int result=0;
if (num1==num2){
System.out.println("相等");
return 0;
}
//return o 是终止
if (num1 > num2){
result=num1;
}
else{
result=num2;
}
//一般在外面return
return result;
}
}
```
![image-20210208034728417](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208034728417.png)
java都是值传递
### 1.5.3方法的重载
![image-20210208034945344](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208034945344.png)
### 1.5.4命令行传递参数
![image-20210208035249703](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208035249703.png)
### 1.5.5可变参数
![image-20210208035559177](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208035559177.png)
不是很懂
### 1.5.6递归——重难点,笔试面试常出现
a方法自己调用自己
![image-20210208040029596](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208040029596.png)
阶层可以用递归自己调用自己算
java是栈运算,尽量不用,可能会影响性能
## 1.6数组详解
![image-20210208040956390](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208040956390.png)
### 1.6.1数组定义
![image-20210208041159785](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208041159785.png)
### 1.6.2数组的声明和创建
![image-20210208041249128](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208041249128.png)
![image-20210208041644482](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208041644482.png)
![image-20210208041800981](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208041800981.png)
### 1.6.3三种初始化和内存分析
![image-20210208041916515](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208041916515.png)
![image-20210208042755979](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208042755979.png)
静态
![image-20210208042827513](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208042827513.png)动态
### 1.6.4下标越界和小结
![image-20210208043046997](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208043046997.png)
![image-20210208042950476](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208042950476.png)
### 1.6.5数组的使用
![image-20210208043817714](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208043817714.png)
![image-20210208043448385](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208043448385.png)
![image-20210208043610010](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208043610010.png)
![image-20210208043736563](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208043736563.png)
### 1.6.6二维数组
![image-20210208043850482](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208043850482.png)
![image-20210208044232836](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208044232836.png)
### 1.6.7arrays详解
![image-20210208044410777](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208044410777.png)
?????不懂,好像就大概是一类,然后可以使用,自己也可以写
### 1.6.8冒泡排序
![image-20210208045617123](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208045617123.png)
![image-20210208050230146](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208050230146.png)
### 1.6.9稀疏数组
![image-20210208050446970](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208050446970.png)
![image-20210208050710838](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208050710838.png)
![image-20210208051032379](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208051032379.png)
![image-20210208051220483](C:\Users\hp\AppData\Roaming\Typora\typora-user-images\image-20210208051220483.png)
今天没认真听讲,开始怀疑我学这玩意的意义……Python它不香嘛,这个好麻烦,但又不想三天打鱼。
标签:JAVA,AppData,image,typora,走神,images,听课,hp,png 来源: https://www.cnblogs.com/qifen2021/p/14387486.html
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