Thread: Few errors. Returning.

Program is saying im missing return statements in the methods, areaCircle, areaTriangle, and areaRectangle even though they are there. What should I do?

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package swingarea;
 
/**
 *
 * @author Logan
 */
public class AreaCalculator extends javax.swing.JFrame {
 
    public AreaCalculator() {
        initComponents();
    }
 
    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
 
        buttonGroup1 = new javax.swing.ButtonGroup();
        dimension1Label = new javax.swing.JLabel();
        rectangleRadioButton = new javax.swing.JRadioButton();
        triangleRadioButton = new javax.swing.JRadioButton();
        dimension2Label = new javax.swing.JLabel();
        dimension1Text = new javax.swing.JTextField();
        dimension2Text = new javax.swing.JTextField();
        inchesLabel1 = new javax.swing.JLabel();
        inchesLabel2 = new javax.swing.JLabel();
        calcAreaButton = new javax.swing.JButton();
        areaLabel = new javax.swing.JLabel();
        outputLabel = new javax.swing.JLabel();
        circleRadioButton = new javax.swing.JRadioButton();
        jMenuBar1 = new javax.swing.JMenuBar();
        jMenu1 = new javax.swing.JMenu();
        clearMenuItem = new javax.swing.JMenu();
        exitMenuItem = new javax.swing.JMenu();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Area Calculator");
 
        dimension1Label.setText("Dimension 1:");
 
        buttonGroup1.add(rectangleRadioButton);
        rectangleRadioButton.setText("Rectangle");
 
        buttonGroup1.add(triangleRadioButton);
        triangleRadioButton.setText("Triangle");
 
        dimension2Label.setText("Dimension 2:");
 
        inchesLabel1.setText("inches");
 
        inchesLabel2.setText("inches");
 
        calcAreaButton.setText("Calculate Area");
        calcAreaButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                calcAreaButtonActionPerformed(evt);
            }
        });
 
        areaLabel.setText("Area is:");
 
        buttonGroup1.add(circleRadioButton);
        circleRadioButton.setText("Circle");
 
        jMenu1.setText("File");
        jMenuBar1.add(jMenu1);
 
        clearMenuItem.setText("Clear");
        clearMenuItem.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                clearMenuItemActionPerformed(evt);
            }
        });
        jMenuBar1.add(clearMenuItem);
 
        exitMenuItem.setText("Exit");
        exitMenuItem.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                exitMenuItemActionPerformed(evt);
            }
        });
        jMenuBar1.add(exitMenuItem);
 
        setJMenuBar(jMenuBar1);
 
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addGroup(layout.createSequentialGroup()
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                .addComponent(circleRadioButton)
                                .addComponent(dimension1Label))
                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                .addGroup(layout.createSequentialGroup()
                                    .addComponent(dimension1Text, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                                    .addGap(18, 18, 18)
                                    .addComponent(inchesLabel1))
                                .addGroup(layout.createSequentialGroup()
                                    .addComponent(rectangleRadioButton)
                                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                    .addComponent(triangleRadioButton))))
                        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                .addGroup(layout.createSequentialGroup()
                                    .addGap(10, 10, 10)
                                    .addComponent(areaLabel))
                                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                                    .addComponent(calcAreaButton)
                                    .addComponent(outputLabel)))
                            .addGap(48, 48, 48)))
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(dimension2Label)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                        .addComponent(dimension2Text, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(18, 18, 18)
                        .addComponent(inchesLabel2))))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(circleRadioButton)
                    .addComponent(rectangleRadioButton)
                    .addComponent(triangleRadioButton))
                .addGap(41, 41, 41)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(dimension1Label)
                    .addComponent(dimension1Text, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(inchesLabel1))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(dimension2Label)
                    .addComponent(dimension2Text, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(inchesLabel2))
                .addGap(31, 31, 31)
                .addComponent(calcAreaButton)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(areaLabel)
                .addGap(20, 20, 20)
                .addComponent(outputLabel))
        );
 
        pack();
    }// </editor-fold>
 
    private void calcAreaButtonActionPerformed(java.awt.event.ActionEvent evt) {
 double area = 0; 
 double areaCircle = 0;
        if (circleRadioButton.isSelected()) 
        { 
            String strRadius = dimension1Text.getText(); 
            int radius = Integer.parseInt(strRadius); 
            area = areaCircle; 
        } 
        String strArea = String.valueOf(area); 
        outputLabel.setText(strArea + " square inches");        // TODO add your handling code here:
    }
public static double areaTriangle(double triBase,double triHeight, double triOutput, int shapeNum) {
        triOutput = (triBase*triHeight)/2;
          if (shapeNum == 1 ){
         return triOutput;
              }
            }
public static double areaCircle (double circOutput,double circRadi, int shapeNum )
{
    {
       circOutput = (Math.pow (circRadi, 2)*Math.PI);    
             if(shapeNum == 2 )
        {
        return circOutput;
        }
    }
       }
public static double areaRectangle(int rectOutput, int lengthRect, int widthRect, int shapeNum) {
        rectOutput = lengthRect*widthRect;
          if(shapeNum == 3 ) {
        return rectOutput;
  }  
     }
    private void exitMenuItemActionPerformed(java.awt.event.ActionEvent evt) {
        System.exit(0);
    }
 
    private void clearMenuItemActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
    }
 
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
         double area = 0; 
 
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(AreaCalculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(AreaCalculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(AreaCalculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(AreaCalculator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
 
        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new AreaCalculator().setVisible(true);
            }
        });
    }
     double area = 0; 
 
    // Variables declaration - do not modify
    private javax.swing.JLabel areaLabel;
    private javax.swing.ButtonGroup buttonGroup1;
    private javax.swing.JButton calcAreaButton;
    private javax.swing.JRadioButton circleRadioButton;
    private javax.swing.JMenu clearMenuItem;
    private javax.swing.JLabel dimension1Label;
    private javax.swing.JTextField dimension1Text;
    private javax.swing.JLabel dimension2Label;
    private javax.swing.JTextField dimension2Text;
    private javax.swing.JMenu exitMenuItem;
    private javax.swing.JLabel inchesLabel1;
    private javax.swing.JLabel inchesLabel2;
    private javax.swing.JMenu jMenu1;
    private javax.swing.JMenuBar jMenuBar1;
    private javax.swing.JLabel outputLabel;
    private javax.swing.JRadioButton rectangleRadioButton;
    private javax.swing.JRadioButton triangleRadioButton;
    // End of variables declaration
}

ublic static double areaCircle (double circOutput,double circRadi, int shapeNum )
{
{
circOutput = (Math.pow (circRadi, 2)*Math.PI);
if(shapeNum == 2 ) {
return circOutput;
}

{

}
}
}

What should I set it to return to If I dont want it to do anything?