size | 易学教程

Java Button Width

阅读更多关于 Java Button Width

问题 I've tried to use this and it doesn't work singleplayerButton.setBounds(20, 20, 200, 100); I dont know why though, can anybody help me out with this? My full page code is here package gmine; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class gmine implements ActionListener { JFrame interfaceFrame; JButton singleplayerButton, multiplayerButton, optionsButton, quitButton; public gmine() { JFrame.setDefaultLookAndFeelDecorated(false); interfaceFrame = new JFrame("G

Python Tkinter: OptionMenu modify dropdown list width

阅读更多关于 Python Tkinter: OptionMenu modify dropdown list width

问题 I have created an OptionMenu from Tkinter with a columnspan of 2. However, the dropdown list/menu does not match the width, so it does not look good. Any idea on how to match their width? self.widgetVar = StringVar(self.top) choices = ['', 'wire', 'register'] typeOption = OptionMenu(self.top, self.widgetVar, *choices) typeOption.grid(column = 0, columnspan = 2, row = 0, sticky = 'NSWE', padx = 5, pady = 5) 回答1: There is no way to change the width of the dropdown. You might want to consider

HTML5 Video Controls - make larger?

阅读更多关于 HTML5 Video Controls - make larger?

问题 I know you can customize the video controls to make your own buttons/layout, but is there any way I can just make the default controls larger? 回答1: Not in a cross-browser way, but the controls are built with Shadow DOM elements. In Chrome, at least, you can enable Show Shadow DOM in the dev tools settings, inspect the video player controls, and glean the CSS that you'd need to supply to affect these elements (in webkit browsers). Sorry, not sure offhand what the support is in other browsers

HTML5 Video Controls - make larger?

阅读更多关于 HTML5 Video Controls - make larger?

HSQLDB and .lobs file size

阅读更多关于 HSQLDB and .lobs file size

问题 I'm using a HSQLDB database in Java which stores files in a column defined as a BLOB. When I add a table row with a file/BLOB to my table the .lobs file increases in size of the file/BLOB. When I add another file to my table it increases in size again (2 x BLOB size). So, I implemented a test method which iterates 10 times and writes the same file to my table and deletes it right after the insert. Now, my .lobs file is 10 x file size... even though I've deleted all the table rows which

Why does an uint64_t needs more memory than 2 uint32_t's when used in a class? And how to prevent this?

阅读更多关于 Why does an uint64_t needs more memory than 2 uint32_t's when used in a class? And how to prevent this?

问题 I have made the following code as an example. #include <iostream> struct class1 { uint8_t a; uint8_t b; uint16_t c; uint32_t d; uint32_t e; uint32_t f; uint32_t g; }; struct class2 { uint8_t a; uint8_t b; uint16_t c; uint32_t d; uint32_t e; uint64_t f; }; int main(){ std::cout << sizeof(class1) << std::endl; std::cout << sizeof(class2) << std::endl; std::cout << sizeof(uint64_t) << std::endl; std::cout << sizeof(uint32_t) << std::endl; } prints 20 24 8 4 So it's fairly simple to see that one

文件打开的模式和文件对象方法

阅读更多关于文件打开的模式和文件对象方法

文件打开模式打开模式执行操作 'r' 以只读方式打开文件（默认） 'w' 以写入的方式打开文件，会覆盖已存在的文件 'x' 如果文件已经存在，使用此模式打开将引发异常 'a' 以写入模式打开，如果文件存在，则在末尾追加写入 'b' 以二进制模式打开文件 't' 以文本模式打开（默认） '+' 可读写模式（可添加到其他模式中使用） 'U' 通用换行符支持文件对象方法文件对象方法执行操作 f.close() 关闭文件 f.read([size=-1]) 从文件读取size个字符，当未给定size或给定负值的时候，读取剩余的所有字符，然后作为字符串返回 f.readline([size=-1]) 从文件中读取并返回一行（包括行结束符），如果有size有定义则返回size个字符 f.write(str) 将字符串str写入文件 f.writelines(seq) 向文件写入字符串序列seq，seq应该是一个返回字符串的可迭代对象 f.seek(offset, from) 在文件中移动文件指针，从from（0代表文件起始位置，1代表当前位置，2代表文件末尾）偏移offset个字节 f.tell() 返回当前在文件中的位置 f.truncate([size=file.tell()]) 截取文件到size个字节，默认是截取到文件指针当前位置来源： https://www

How to determine the maximum stack size limit?

阅读更多关于 How to determine the maximum stack size limit?

问题 I want to determine the maximum size of the stack programmatically from within Java (the size set by -Xss). How do I do this? Alternatively, as my Java module also uses a native code module, I would be able to do this via JNI; but how? 回答1: Use ManagementFactory.getRuntimeMXBean().getInputArguments() to access all arguments passed to VM. 回答2: Maybe not best practice but certainly straight-forward: I'd write a recursive method counting up a value, recurring until java.lang.StackOverflowError

How to draw shape or lines within a WPF button that size to the control without cause the button to expand forever?

阅读更多关于 How to draw shape or lines within a WPF button that size to the control without cause the button to expand forever?

问题 I had a quick Google, and a quick look around StackOverflow, but couldn't find anyone else who'd run into this problem. I want to create a close button with a little X in it. The close button will do things like fade in and out when you're hovering over the item containing it, change colour when you mouse over, and all the usual WPF loveliness. Bottom line, it doesn't seem like it should be that difficult, but I'm running into one of the weirdest issues ever before I've even got to this stage

php get array's data size

阅读更多关于 php get array's data size

问题 Having this array: Array ( [_block1] => Array ( [list] => Array ( [sub-list] => Array ( ) ) [links] => Number [total] => Number ... ) [_block2] => Array ( [@attributes] => Array ( ) [title] => ... [data] => Array () ... ) [_block3] => Array ( .. ) ) Those blocks contain data returned by api. Knowing that each api returns data in a different way/structure I need to measure/calculate the data/size inside of each and one of them and then do if data > X or < do something. Is it possible? I have