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how to check the jdk version used to compile a .class file [duplicate]
...
Alternatively, if you open the class file in a hex editor you can look at bytes 7 and 8. The number will map to the numbers given in the above answer. E.g. 00 2E -> JDK 1.2 = 46 (0x2E hex). Useful if you don't have access to javap. ref: en.wikipedia.org/wiki/Java_class...
What is the exact meaning of IFS=$'\n'?
...ne to three digits)
\xHH
the eight-bit character whose value is the hexadecimal value HH (one or two hex digits)
\uHHHH
the Unicode (ISO/IEC 10646) character whose value is the hexadecimal value HHHH (one to four hex digits)
\UHHHHHHHH
the Unicode (ISO/IEC 10646) character whose...
Android get color as string value
...
Just for the sake of easy copypasta:
"#" + Integer.toHexString(ContextCompat.getColor(getActivity(), R.color.some_color));
Or if you want it without the transparency:
"#" + Integer.toHexString(ContextCompat.getColor(getActivity(), R.color.some_color) & 0x00ffffff);
...
SVG fill color transparency / alpha?
...
fill="#044B9466"
This is an RGBA color in hex notation inside the SVG, defined with hex values. This is valid, but not all programs can display it properly...
You can find the browser support for this syntax here: https://caniuse.com/#feat=css-rrggbbaa
As of August...
jQuery.parseJSON throws “Invalid JSON” error due to escaped single quote in JSON
...ting... but did they mean any character may be escaped if it consists of 4 hex digits? According to both the state diagram above and the one in section 7 of the RFC, escape of a single quote as written \' is still not allowed. It would be nice if the RFC was more explicit on this point.
...
How to validate GUID is a GUID
...UID is a 16-byte (128-bit) number, typically represented by a 32-character hexadecimal string. A GUID (in hex form) need not contain any alpha characters, though by chance it probably would. If you are targeting a GUID in hex form, you can check that the string is 32-characters long (after strippi...
How can I generate random alphanumeric strings?
... always the same and therefore not random, for example the 13 character in hex is always "4" - at least in a version 6 GUID.
This solution also lets you generate a string of any length.
Solution 2 - One line of code - good for up to 22 characters
Convert.ToBase64String(Guid.NewGuid().ToByteArray(...
When should we use Observer and Observable?
... String: "
+ Integer.toOctalString( subject.getState() ) );
}
}
HexaObserver.java
public class HexaObserver extends Observer{
public HexaObserver(Subject subject){
this.subject = subject;
this.subject.attach(this);
}
@Override
public void update() {
System.out.print...
移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...弄明白这点。在早先的移动设备中，屏幕像素密度都比较低，如iphone3，它的分辨率为320x480，在iphone3上，一个css像素确实是等于一个屏幕物理像素的。后来随着技术的发展，移动设备的屏幕像素密度越来越高，从iphone4开始，苹...
Text Editor which shows \r\n? [closed]
....e. View, White sapce menu).
It also has an option to display the file in hex mode (i.e. Tools, Hex Dump menu).
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