Groovy's static import capability allows you to reference imported classes as if they were static methods in your own class. This is similar to Java's static import capability but works with Java 1.4 and above and is a little more dynamic than Java in that it allows you to define methods with the same name as an imported method as long as you have different types. If you have the same types, the imported class takes precedence. Here is a sample of its usage:
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import static java.awt.Color.LIGHT_GRAY import static Boolean.FALSE as F import static Calendar.getInstance as now import static java.lang.Integer.* println LIGHT_GRAY // => java.awt.Color[r=192,g=192,b=192] println !F // => true println now().time // => Sun Apr 29 11:12:43 EST 2007 println "Integers are between $MIN_VALUE and $MAX_VALUE" // => Integers are between -2147483648 and 2147483647 def toHexString(int val, boolean upperCase) { def hexval = upperCase ? toHexString(val).toUpperCase() : toHexString(val) return '0x' + hexval } println toHexString(15, true) // => 0xF println toHexString(15, false) // => 0xf |
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As another example, here is how to statically import some of the Math functions:
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import static java.lang.Math.*
println sin(123.456) * cos(456.789)
// => 0.24733809349262376
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