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invalid target release: 1.7
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You need to set JAVA_HOME to your jdk7 home directory, for example on Microsoft Windows:
"C:\Program Files\Java\jdk1.7.0_40"
or on OS X:
/Library/Java/JavaVirtualMachines/jdk1.7.0_40.jdk/Contents/Home
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How to check if a String is numeric in Java
...tils.isParsable which basically checks the number is parsable according to Java. (The linked javadocs contain detailed examples for each method.)
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Effect of a Bitwise Operator on a Boolean in Java
... behaviour in the latter case is specified. See the section 15.22.2 of the Java Language Specification for details.
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Java Pass Method as Parameter
I am looking for a way to pass a method by reference. I understand that Java does not pass methods as parameters, however, I would like to get an alternative.
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How to print a float with 2 decimal places in Java?
...ike so:
System.out.printf("%.2f", val);
In short, the %.2f syntax tells Java to return your variable (val) with 2 decimal places (.2) in decimal representation of a floating-point number (f) from the start of the format specifier (%).
There are other conversion characters you can use besides f:
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console.writeline and System.out.println
...m.out.println("Console is: " + System.console());
}
}
results in:
$ java ConsoleTest
Console is: java.io.Console@2747ee05
$ java ConsoleTest </dev/null
Console is: null
$ java ConsoleTest | cat
Console is: null
The reason Console exists is to provide features that are useful in the speci...
Convert from java.util.date to JodaTime
I want to convert a java.util.Date to JodaTime so as to carry out subtractions between dates. Is there a good concise way to convert from Date to JodaTime ?
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Is there a Java equivalent to C#'s 'yield' keyword?
I know there is no direct equivalent in Java itself, but perhaps a third party?
6 Answers
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How to create a new java.io.File in memory?
How can I create new File (from java.io ) in memory, not on the hard disk?
3 Answers
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Alternatives to java.lang.reflect.Proxy for creating proxies of abstract classes (rather than interf
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It can be done using Javassist (see ProxyFactory) or CGLIB.
Adam's example using Javassist:
I (Adam Paynter) wrote this code using Javassist:
ProxyFactory factory = new ProxyFactory();
factory.setSuperclass(Dog.class);
factory.setFilter(
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