【已解决】Java中如何类的初始化

• “1. Every class has a constructor whether it’s a normal class or a abstract class.
• 2. Constructors are not methods and they don’t have any return type.
• 3. Constructor name should match with class name .
• 4. Constructor can use any access specifier, they can be declared as private also. Private constructors are possible in java but there scope is within the class only.
• 5. Like constructors method can also have name same as class name, but still they have return type, though which we can identify them that they are methods not constructors.
• 6. If you don’t implement any constructor within the class, compiler will do it for.
• 7. this() and super() should be the first statement in the constructor code. If you don’t mention them, compiler does it for you accordingly.
• 8. Constructor overloading is possible but overriding is not possible. Which means we can have overloaded constructor in our class but we can’t override a constructor.
• 9. Constructors can not be inherited.
• 10. If Super class doesn’t have a no-arg(default) constructor then compiler would not insert a default constructor in child class as it does in normal scenario.
• 11. Interfaces do not have constructors.
• 12. Abstract class can have constructor and it gets invoked when a class, which implements interface, is instantiated. (i.e. object creation of concrete class).
• 13. A constructor can also invoke another constructor of the same class – By using this(). If you want to invoke a parameterized constructor then do it like this: this(parameter list).”

public class EmulateBaiduLogin {
    private static CookieManager cookieManager;
    private static OkHttpClient httpClient;

    EmulateBaiduLogin(){
        cookieManager = new CookieManager();
        cookieManager.setCookiePolicy(CookiePolicy.ACCEPT_ALL);
        httpClient = new OkHttpClient.Builder()
            .addInterceptor(new LoggingInterceptor())
            .addInterceptor(new ResponseInterceptor())
            .cookieJar(new JavaNetCookieJar(cookieManager))
            .build();
    }
}

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