Day01: learning notes

Day01 Learning notes

Windows Common shortcut keys

• Ctrl + C （ Copy ）
• Ctrl + V （ Paste ）
• Ctrl + X （ shear ）
• Ctrl + A （ Future generations ）
• Ctrl + S （ preservation ）
• Ctrl + Z （ revoke ）
• Alt + F4 ( close window )
• Win + R （ function ）
• Ctrl + Shift + Esc （ Open Task Manager ）
• Shift + delete （ Permanently delete files ）

common Dos command

# Drive switch ： For example, switching D disc d:

# View all files in the current directory
dir

# Toggle directory
cd /d + Disks to switch :

# Return to the previous directory
cd . .
# Create directory md
# Delete directory rd
# create a file cd>
# Delete file del

Java Features and advantages

• simplicity
• object-oriented
• Portability
• High performance
• Distributed
• dynamic
• Multithreading
• Security
• Robustness,

Java Three versions of

1. JavaSE： The standard version （ Desktop applications , Console development …）
2. JavaME： Embedded development （ mobile phone , small home appliances …）
3. JavaEE：E Enterprise development （web End 、 Server development …）