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Rounding a double to turn it into an int (java)
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import java.math.*;
public class TestRound11 {
public static void main(String args[]){
double d = 3.1537;
BigDecimal bd = new BigDecimal(d);
bd = bd.setScale(2,BigDecimal.ROUND_HALF_UP);
// output is 3.15
Syste...
What does java.lang.Thread.interrupt() do?
Could you explain what java.lang.Thread.interrupt() does when invoked?
9 Answers
9
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How to serialize an object into a string
...u still want to write it down into a String you can encode the bytes using java.util.Base64.
Still you should use CLOB as data type because you don't know how long the serialized data is going to be.
Here is a sample of how to use it.
import java.util.*;
import java.io.*;
/**
* Usage sample s...
java.net.URLEncoder.encode(String) is deprecated, what should I use instead?
I get the following warning when using java.net.URLEncoder.encode :
6 Answers
6
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Different results with Java's digest versus external utilities
I have written a simple Java class to generate the hash values of the Windows Calculator file. I am using Windows 7 Professional with SP1 . I have tried Java 6.0.29 and Java 7.0.03 . Can someone tell me why I am getting different hash values from Java versus (many!) external utilities and/or ...
How is the java memory pool divided?
I’m currently monitoring a Java application with jconsole. The memory tab lets you choose between:
4 Answers
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List of Java class file format major version numbers?
I saw this list of major version numbers for Java in another post:
4 Answers
4
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Getting “unixtime” in Java
...an 1, 1970. Unixtime is seconds since Jan 1, 1970. I don't usually code in java, but I'm working on some bug fixes. I have:
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DaffyMenu 扩展：弹出菜单扩展，为组件添加弹出式菜单功能 · App Inventor 2 中文网
...按钮 "用户管理"
调用 DaffyMenu1.添加菜单项 管理按钮 "系统设置"
调用 DaffyMenu1.添加菜单项 管理按钮 "数据备份"
否则如果 用户权限 = "用户" 则
// 普通用户菜单
调用 DaffyMenu1.清除菜单项 用户按钮
调用 DaffyMenu1.添...
What is a reasonable order of Java modifiers (abstract, final, public, static, etc.)?
What is a reasonable order of Java modifiers?
4 Answers
4
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