Help threads

pessoal fiz o seguinte… criei uma classe

public class BuscarConsultaBanco  extends Thread {
 public void run(){
      codigo.....
  }
}

e na minha principal qdo eu clico em um botao ele executa

buscarConsultas.start();

na primeira vez q eu clico ele faz perfeito o processo na segunda ele gera o seguinte erro:

Exception in thread "AWT-EventQueue-0" java.lang.IllegalThreadStateException
        at java.lang.Thread.start(Thread.java:595)
        at br.com.dnasolution.gui.PrincipalJF.buscarConsultas(PrincipalJF.java:278)
        at br.com.dnasolution.gui.PrincipalJF.access$100(PrincipalJF.java:22)
        at br.com.dnasolution.gui.PrincipalJF$2.actionPerformed(PrincipalJF.java:74)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
        at java.awt.Component.processMouseEvent(Component.java:6038)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)
        at java.awt.Component.processEvent(Component.java:5803)
        at java.awt.Container.processEvent(Container.java:2058)
        at java.awt.Component.dispatchEventImpl(Component.java:4410)
        at java.awt.Container.dispatchEventImpl(Container.java:2116)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
        at java.awt.Container.dispatchEventImpl(Container.java:2102)
        at java.awt.Window.dispatchEventImpl(Window.java:2429)
        at java.awt.Component.dispatchEvent(Component.java:4240)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

alguem sabe me informar o pq ele da erro na segunda vez sendo q qdo eu rodo ela pela segunda vez o status e de q ela ja terminou TERMINED

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