java小记（四）

拼搏现实的明天。 2023-12-01 07:02 46阅读 0赞

1.在eclipse中如何输入`main(String[] args)`中的`args`

转载博客:[https://blog.csdn.net/hitwhylz/article/details/12858699][https_blog.csdn.net_hitwhylz_article_details_12858699]

2.windows dos 常用命令行:  
dir (directory) ：列出当前目录下的文件以及文件夹  
md (make directory)： 创建目录  
rd (remove directory)：删除目录  
cd (change directory)：进入指定目录  
cd… : 退回到上一级目录  
cd\\ : 退回到根目录  
del：删除文件  
exit：退出dos命令行  
cls (clear screen): 清屏

转载自博客:[https://blog.csdn.net/ternence\_hsu/article/details/70739002][https_blog.csdn.net_ternence_hsu_article_details_70739002]

3.Java 8种数据类型大小

转载博客:[https://blog.csdn.net/baidu\_36327010/article/details/79727264][https_blog.csdn.net_baidu_36327010_article_details_79727264]

4.byte,short,int,它们三者在计算时会自动转换成int类型。

5.转义字符

转载博客:[https://blog.csdn.net/w405722907/article/details/72461536][https_blog.csdn.net_w405722907_article_details_72461536]

6.switch语句有关规则

转载链接:[https://www.runoob.com/java/java-switch-case.html][https_www.runoob.com_java_java-switch-case.html]  
转载博客:[https://blog.csdn.net/youanyyou/article/details/80406452][https_blog.csdn.net_youanyyou_article_details_80406452]

7.方法的实参和形参的类型要相互兼容，且：实参的取值范围要小于或者等于形参类型的取值范围。

8.`System.exit()`的使用

转载博客:[https://www.cnblogs.com/wdfwolf3/p/7466792.html][https_www.cnblogs.com_wdfwolf3_p_7466792.html]

[https_blog.csdn.net_hitwhylz_article_details_12858699]: https://blog.csdn.net/hitwhylz/article/details/12858699
[https_blog.csdn.net_ternence_hsu_article_details_70739002]: https://blog.csdn.net/ternence_hsu/article/details/70739002
[https_blog.csdn.net_baidu_36327010_article_details_79727264]: https://blog.csdn.net/baidu_36327010/article/details/79727264
[https_blog.csdn.net_w405722907_article_details_72461536]: https://blog.csdn.net/w405722907/article/details/72461536
[https_www.runoob.com_java_java-switch-case.html]: https://www.runoob.com/java/java-switch-case.html
[https_blog.csdn.net_youanyyou_article_details_80406452]: https://blog.csdn.net/youanyyou/article/details/80406452
[https_www.cnblogs.com_wdfwolf3_p_7466792.html]: https://www.cnblogs.com/wdfwolf3/p/7466792.html