This is why:

People that make decisions at Google, you guys are super smart, why do you use Java for Android?

You've removed support for Java applets in Chrome (which was one of the best decisions you made with Chrome).

Why bother with a crappy language whose "brand new features" are already behind the curve???

Consider:
{
public final byte VALUE1 = 0xF0;
public final byte VALUE2 = 0x10;
}

The highlighted part is an error. Really?

OK, Java developers aren't allowed to determine the size of a variable (they should just know that float is always 32-bits) but when initialising a byte to anything >127 (0x7F) Java thinks it's a negative number and therefore cannot be assigned to a byte. WTF, Java?

Come on.

Here is a workaround:
{
public final byte VALUE1 = (byte)0xF0;
}

Fucking Java...

Here is some code:

String s1 = "Hello";
String s2 = "World!";
String s3 = s1 + " " + s2;

If operator overloading is "so bad" that the developers shouldn't use it, why do you???

The above code should've been (which is also valid):

...
String s3 = s1.concat(" ").concat(s2);

WTF???

A great article about ViewPager and using it without fragments: https://www.bignerdranch.com/blog/viewpager-without-fragments/

public enum CustomPagerEnum {

 
    RED(R.string.red, R.layout.view_red),
    BLUE(R.string.blue, R.layout.view_blue),
    ORANGE(R.string.orange, R.layout.view_orange);
    

    private int mTitleResId;
    private int mLayoutResId;
 
    CustomPagerEnum(int titleResId, int layoutResId) {

        mTitleResId = titleResId;

        mLayoutResId = layoutResId;

    }
 
    public int getTitleResId() { return mTitleResId; }
    public int getLayoutResId() { return mLayoutResId; }
}

OK, What The FUCK, Java?????????????

Why is there a constructor, local variables, and methods (did I miss anything?) in a fucking enum???

Oh, wait, I did miss something (corollary of having a constructor): RED, BLUE, and ORANGE are not constant integral values like in any other language. How on Mother Earth is this an enum???

Why not just call it a class with public static final members???

StringBuilder sb=new StringBuilder();

sb.append("Data length: ").append(data != null ? data.length : "<null>").append("\n");

I understand that a StringBuilder object can append almost anything, but C# would've told me I'm an idiot for returning different types in a ternary operator...