Revision [1832]
This is an old revision of CommandJset made by DavidLee on 2012-05-11 16:41:31.
Command jset
Name
jcall Sets a variable as a result of creating a java object or calling a java method.Synopsis
jset [options] [args ...]Description
Jset creates a new Java Object or calls a static or instance method on that object or a supplied object.The result is assigned to the named variable.
See jnew and Java Objects for a function equivalent.
Options
| -v,-variable name | Assigns the result to the named variable in the current scope |
| -c,-classname classname | Creates a new instance of a class given its fully qualified classname and calls the a constructor |
| -m,-method method | Calls an instance method on the object specified with -object or a static method if no -object |
| -o,-object object | Uses the specified object for a method call (-method) |
| -f,-field field | Gets the value of a field of a static class or instance |
-variable is required and the name is the name of an existing or to be created variable in the current scope.
If -classname is passed then the classname is used to either create a new variable or if -m is specified calling a static method on classname.
If -method is supplied then an instance method is called (requires -object)
If -object is supplied then -method is required and the specified method is invoked on the object.
If any additional arguments are specified they are used as the argument list for the constructor or method call,
using the same boxing and conversions in Java Objects.
In all cases the result value (new object or return from method call) is assigned to the specified variable.
Examples
Create a Data object with default constructor and assign to "date" and print its type and value (using Date.toString())
jset -v date -c java.util.Date xtype $date echo $date
Result
java.util.Date Fri Dec 03 09:46:11 EST 2010
Get the unix time of the date created
jset -v time -o $date -m getTime xtype $time echo $time
Result
java.lang.Long 1291387571095
Create an integer by passing in a string value of "12345"
jset -v int -c java.lang.Integer 12345 xtype $int echo $int
Result
java.lang.Integer 12345
Create a hex representation from an integer by calling a static method java.lang.Integer.toHexString( int )
jset -v hex -c java.lang.Integer -m toHexString $int xtype $hex echo $hex
Result
java.lang.String 3039
Get the Integer.MIN_VALUE field
jset -v min -c java.lang.Integer -f MIN_VALUE echo $min
Result
-2147483648
CategoryCommands
Commands
