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You can load Java in the cloud, in either the interactive web interface or in deployed code. (Some things are different about those environments.) CloudEvaluate[ Needs@"JLink`"; str = JavaNew["java.lang.String", "Hello, world!"]; JavaObjectToExpression[str]] "Hello, world!" As pointed out by Andreas Lauschke, ReinstallJava[] crashed the kernel ...


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In Version 10 we have BoundaryDiscretizeGraphics and RegionMember to the rescue. So here we go: Reproducing the graphics: data = Flatten[Table[{x, y, z, x^2 + y^2 + z^2 + RandomReal[0.1]}, {x, -2, 2, 0.2}, {y, -2, 2, 0.2}, {z, -2, 2, 0.2}], 2]; (* Thanks to Taliesin Beynon for the tip *) plot = ListContourPlot3D[data, Contours -> {1}, Mesh -> ...



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