IDEA Strange sex tips

IDEA is the best IDE on the market today, I said!

Eclipse was very popular in the market a few years ago, so most people are used to some of its shortcuts. In recent years, with the rise of IDEA, many people have abandoned Exlipse in favor of IDEA, but some people prefer to replace the shortcut keys with Eclipse. I don’t recommend doing this. It takes about a week to get familiar with a set of shortcut keys. You can use the default shortcut keys of IDEA to experience more hidden tricks.

1. Postfix Completion

Postfix Completion is really just a set of templates for code Completion. You can see some of his templates in Settings — >Editor — >General — Postfix Completion. Let’s take a look at some commonly used syntax.

If the relevant

To test, define a Boolean variable flag and a String variable name.

boolean flag = true;
String name = "Java journey";
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1. Judgment condition holds

Grammar:

flag.if
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Effect:

if (flag) {}
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2. The judgment condition is not valid

Grammar:

flag.else
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Effect:

if(! flag) {}Copy the code

3. The judgment condition is null

Grammar:

string.null
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Effect:

if (string == null) {}
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4. The judgment condition is not null

Grammar:

String. The notnull or string. The nnCopy the code

Effect:

if(string ! =null) {}
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5. Using the Switch

Grammar:

string.switch
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Effect:

switch (string) {}
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6. Use while to judge

Grammar:

flag.while
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Effect:

while (flag) {}
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For the relevant

Define an array of type string to test.

String[] param = {"1"."2"."3"};
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1. Iterate from the first element

Grammar:

param.fori
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Effect:

for (int i = 0; i < param.length; i++) {}
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2. Iterate from the last element

Grammar:

param.forr
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Effect:

for (int i = param.length - 1; i >= 0; i--) {}
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3. Enhanced for loop

Grammar:

param.forOr param. IterCopy the code

Effect:

for (String s : param) {}
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Variables related to

Define a new User class and add the name and age attributes for testing.

public class User {
    
    private String name = "Java journey";
    private int age = 18;
    
    public User(a) {}

    public User(String name, int age) {
        this.name = name;
        this.age = age; }}Copy the code

1. Create an object

Grammar:

User.new
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Effect:

new User();
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2. Create a local variable

Grammar:

new User().var
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Effect:

User user = new User();
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3. Create a global variable

Grammar:

new User().field
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Effect:

private User user;
user = new User();
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4. Cast Object type, if we will convert Object to User

Grammar:

new object.castvar
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Effect:

User user = (User) new Object();
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Other common

1. Return statement

Grammar:

"".return
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Effect:

return "";
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2. Print statements

Grammar:

flag.sout
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Effect:

System.out.println(flag);
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3. Catch and handle exceptions

Grammar:

new User().try
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Effect:

try {
    new User();
} catch (Exception e) {
    e.printStackTrace();
}
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4. An exception is thrown

Grammar:

new Exception().throw
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Effect:

throw new Exception();
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5. Lock variables

Grammar:

string.synchronized
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Effect:

synchronized (string) {}
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Second, the inject language

Inject Language can quickly help us build some of the syntax we need. Examples include JSON, HTML, XML, and so on.

Quick JSON definition

If we define a JSON string ourselves, we need to manually use \ to “escape. We use Inject language to eliminate this step.

Define a JSON string, place the cursor in the middle of “”, and then press Alt+Enter. Select Inject Language or Reference when the following message is displayed.

Then press Enter to Enter, select or search for JSON, and press Enter. Then press Alt+Enter and select Edit JSON Fragment after the following prompt is displayed.

When you press Enter, an input box will pop up. We can just write our JSON in the input box and it will automatically escape for us.

The same is true with HTML and so on, which will automatically complete the closing tag for us.

A couple of mysterious shortcuts

• Quick rename

Shift+F6
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• Locate the most recently viewed file

Ctrl+E
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• Locate the most recently modified file

Ctrl+Shift+E
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• View all methods of the current class

Ctrl+F12
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• See the class diagram

Ctrl+Shift+Alt+U 
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