JGraphXでサークル型に図形を自動配置する

JGraphXでサークル型に図形を自動配置するには、以下のコードのようにmxLayoutManagerとmxCircleLayoutを使用します。
サンプルコード

import java.awt.*
import javax.swing.*
import groovy.swing.*
import com.mxgraph.swing.*
import com.mxgraph.view.*
import com.mxgraph.util.mxConstants
import com.mxgraph.layout.*

def graph = new mxGraph()
def mxgc = new mxGraphComponent(graph)

sb = new SwingBuilder()
def frm = sb.frame(
  title: "JGraphX - circle layout",
  visible: true,
  size: [300, 300],
  resizable: true,
  contentPane: mxgc,
  defaultCloseOperation: WindowConstants.EXIT_ON_CLOSE
){

  parent = graph.getDefaultParent()
  graph.model.beginUpdate()
  try
  {
    def v1 = graph.insertVertex(parent, null, "処理1",
      0, 0, 50, 30)
    def v2 = graph.insertVertex(parent, null, "処理2",
      0, 0, 50, 30)
    def v3 = graph.insertVertex(parent, null, "処理3",
      0, 0, 50, 30)
    def v4 = graph.insertVertex(parent, null, "処理4",
      0, 0, 50, 30)
    def v5 = graph.insertVertex(parent, null, "処理5",
      0, 0, 50, 30)
    def v6 = graph.insertVertex(parent, null, "処理6",
      0, 0, 50, 30)

    graph.insertEdge(parent, null, "呼出", v1, v2)
    graph.insertEdge(parent, null, "呼出", v1, v3)
    graph.insertEdge(parent, null, "呼出", v1, v4)
    graph.insertEdge(parent, null, "呼出", v1, v5)
    graph.insertEdge(parent, null, "呼出", v1, v6)

    def lm = new mxLayoutManager(graph)
    def cl = new mxCircleLayout(graph)
    cl.setRadius(50)
    lm.executeLayout(cl, graph.getDefaultParent())

  }
  finally
  {
    graph.model.endUpdate()
  }
}

実行結果

関連情報
JGraphxのダウンロードページ