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How can I pad an integer with zeros on the left?
How do you left pad an int with zeros when converting to a String in java?
16 Answers
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How to get VM arguments from inside of Java application?
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With this code you can get the JVM arguments:
import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;
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RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
List<String> arguments = runtimeMxBean.getInputArguments();
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What's the difference between == and .equals in Scala?
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Does it also apply when using Java libraries?
– Jus12
Oct 6 '11 at 22:50
20
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eclipse 工程多版本共存的编译技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...本的so文件真正的lib名称是一致的：
如果在ld.so.conf系统目录中，使用ldconfig命令会自动生成so原始文件（规则在elf头部，使用 readelf -d 查看）；用户目录下则需要自行 ln -s 创建链接。
如：libBase.so.dev libBase.so.1.6 它们实际...
String concatenation: concat() vs “+” operator
...ring b) {
a += b;
return a;
}
}
Now disassemble with javap -c (included in the Sun JDK). You should see a listing including:
java.lang.String cat(java.lang.String, java.lang.String);
Code:
0: new #2; //class java/lang/StringBuilder
3: dup
4: invokespecial ...
Creating java date object from year,month,day
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IBM API designers, JavaScript API designers. Other than that, probably nobody. Note that Calendar is now obsoleted by th the Java 8 java.time API, which does the right thing.
– JB Nizet
Sep 27 '17 at 6:55
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How can I “pretty print” a Duration in Java?
Does anyone know of a Java library that can pretty print a number in milliseconds in the same way that C# does?
11 Answers
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Use of “instanceof” in Java [duplicate]
I learned that Java has the instanceof operator. Can you elaborate where it is used and what are its advantages?
4 Answer...
When does Java's Thread.sleep throw InterruptedException?
When does Java's Thread.sleep throw InterruptedException? Is it safe to ignore it? I am not doing any multithreading. I just want to wait for a few seconds before retrying some operation.
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Convert String to Calendar Object in Java
I am new to Java, usually work with PHP.
8 Answers
8
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