Erro de cast String para Integer

Estou tendo um problema em programa de caixa e vendas que estou fazendo em Java e utilizando MySQL como Banco de Dados, é minha primeira vez fazendo isso então não tenho certeza se estou no caminho certo.

Esse é o código que estou usando

if(tblCaixa.getSelectedRow() != -1) {

        Peca p = new Peca();
        PecaDAO dao = new PecaDAO();
        p.setNome_da_peca(txtNomePc.getText());
        p.setModelo(txtModel.getText());
        p.setEstoque_min(Integer.parseInt(txtEstoqMin.getText()));
        p.setEstoque_at(Integer.parseInt(txtEstoqAt.getText()));
        p.setPreco_c(Float.parseFloat(txtPrecoC.getText()));
        p.setLucro(Integer.parseInt(txtLucro.getText()));
        p.setPreco_v(Float.parseFloat(lblPrecoV.getText()));
        p.setIdpeca((int) tblCaixa.getValueAt(tblCaixa.getSelectedRow(),0));

        dao.update2( p );

        txtNomePc.setText("");
        txtModel.setText("");
        txtEstoqMin.setText("");
        txtEstoqAt.setText("");
        txtPrecoC.setText("");
        txtLucro.setText("");
        lblPrecoV.setText("");

        readJTable();
    }

Quando eu executo o programa aparece o seguinte erro

Exception in thread “AWT-EventQueue-0” java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer

at view.Info.btnSaveActionPerformed(Info.java:315)

at view.Info.access$100(Info.java:17)

at view.Info$2.actionPerformed(Info.java:133)

at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)

at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)

at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)

at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)

at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)

at java.awt.Component.processMouseEvent(Component.java:6539)

at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)

at java.awt.Component.processEvent(Component.java:6304)

at java.awt.Container.processEvent(Container.java:2239)

at java.awt.Component.dispatchEventImpl(Component.java:4889)

at java.awt.Container.dispatchEventImpl(Container.java:2297)

at java.awt.Component.dispatchEvent(Component.java:4711)

at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)

at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)

at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)

at java.awt.Container.dispatchEventImpl(Container.java:2283)

at java.awt.Window.dispatchEventImpl(Window.java:2746)

at java.awt.Component.dispatchEvent(Component.java:4711)

at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)

at java.awt.EventQueue.access$500(EventQueue.java:97)

at java.awt.EventQueue$3.run(EventQueue.java:709)

at java.awt.EventQueue$3.run(EventQueue.java:703)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)

at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)

at java.awt.EventQueue$4.run(EventQueue.java:733)

at java.awt.EventQueue$4.run(EventQueue.java:731)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)

at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)

at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)

at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

No NetBeans não mostra nenhum erro no código, será que é algo que eu esqueci?