Basic introduction
JDK is a Java language software development toolkit, mainly used for Java applications on mobile devices and embedded devices. JDK is the core of the entire Java development. It includes the JAVA running environment, JAVA tools and JAVA basic class libraries. When learning JavaSE, what you play with is the API.
How to use
After downloading is complete, open it
If the following situation occurs, it will open to a blank page.
Right click on the program icon and click Properties
Click to unlock and confirm
Tips
☆Introducing JDK API help documentation
Open the JDK API document. The upper left half we see is an introduction to all packages, the lower left half is an introduction to the files in the package, and the right is an introduction to the class selected on the left.
We choose the Scanner class as an example here. First, I looked for "Display" in the menu item above the opened api, and then clicked on it. Then the current api changes to three columns, which can be ignored. Click the "Index (N)" item.
Next, enter Scanner in the text box below "Enter keywords to query (W)", then when you see this appear below, select Scanner, double-click it or press Enter.
Pop up this box
This is asking you whether to open the Scanner's description page, just click the show button.
At this time, the part on the right we see is an explanation of the commonly used Scanner class.
Useful
Useful
Useful