java - 即使条件变为 false，代码也会在 if block 内运行

Question

我不知道发生了什么。即使条件为 false，if block 内的代码仍在运行。我在 netbeans ide 7.4 中设计了界面，然后将设计复制粘贴到 eclipse 中。这是我的代码

import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class AddSymbol extends javax.swing.JFrame {

    /**
     * Creates new form NewJFrame
     */
    Connection c;
    public AddSymbol() {


        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.
     */

    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {
        String x = "hello";
        if(x.equals("hii"))
        {
            System.out.println("Inside hi");
        }

        jinstrument = new javax.swing.JComboBox();
        jsymbol = new javax.swing.JComboBox();
        jexpiry = new javax.swing.JComboBox();
        joption = new javax.swing.JComboBox();
        jstrikeprice = new javax.swing.JComboBox();
        instrument = new javax.swing.JLabel();
        symbol = new javax.swing.JLabel();
        expiry = new javax.swing.JLabel();
        jLabel4 = new javax.swing.JLabel();
        jLabel5 = new javax.swing.JLabel();
        jPanel2 = new javax.swing.JPanel();
        instrumentLabel = new javax.swing.JLabel();
        symbolLabel = new javax.swing.JLabel();
        expiryLabel = new javax.swing.JLabel();
        optionLabel = new javax.swing.JLabel();
        strikeLabel = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        getContentPane().setLayout(null);

        jinstrument.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Equity", "OPTIDX", "OPTSTK", "FUTIDX", "FUTSTK", " " }));
        getContentPane().add(jinstrument);
        jinstrument.setBounds(10, 38, 83, 20);

        jsymbol.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));
        getContentPane().add(jsymbol);
        jsymbol.setBounds(120, 38, 210, 20);

        jexpiry.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));
        getContentPane().add(jexpiry);
        jexpiry.setBounds(380, 38, 180, 20);

        joption.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "PE", "CE" }));
        getContentPane().add(joption);
        joption.setBounds(10, 85, 66, 20);

        jstrikeprice.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));
        getContentPane().add(jstrikeprice);
        jstrikeprice.setBounds(120, 85, 56, 20);

        instrument.setText("Instrument");
        getContentPane().add(instrument);
        instrument.setBounds(10, 13, 83, 14);

        symbol.setText("Symbol");
        getContentPane().add(symbol);
        symbol.setBounds(120, 13, 218, 14);

        expiry.setText("Expiry");
        getContentPane().add(expiry);
        expiry.setBounds(380, 13, 180, 14);

        jLabel4.setText("Option Type");
        getContentPane().add(jLabel4);
        jLabel4.setBounds(10, 69, 83, 14);

        jLabel5.setText("Strike Price");
        getContentPane().add(jLabel5);
        jLabel5.setBounds(120, 69, 56, 14);

        jPanel2.setLayout(null);

        jinstrument.addItemListener(new ItemListener() {

            @Override
            public void itemStateChanged(ItemEvent arg0) {
                // TODO Auto-generated method stub
                jsymbol.removeAllItems();
                int enterloop=0;
                if(jinstrument.getSelectedItem().equals("FUTSTK"))
                {
                    enterloop =1;
                }


                if(enterloop == 1);
                {   System.out.println("inside if");

                }

            }
        });



        getContentPane().add(jPanel2);
        jPanel2.setBounds(10, 135, 577, 338);


    }// </editor-fold>                        

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {

        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new AddSymbol().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JLabel expiry;
    private javax.swing.JLabel expiryLabel;
    private javax.swing.JLabel instrument;
    private javax.swing.JLabel instrumentLabel;
    private javax.swing.JLabel jLabel4;
    private javax.swing.JLabel jLabel5;
    private javax.swing.JPanel jPanel2;
    private javax.swing.JComboBox jexpiry;
    private javax.swing.JComboBox jinstrument;
    private javax.swing.JComboBox joption;
    private javax.swing.JComboBox jstrikeprice;
    private javax.swing.JComboBox jsymbol;
    private javax.swing.JLabel optionLabel;
    private javax.swing.JLabel strikeLabel;
    private javax.swing.JLabel symbol;
    private javax.swing.JLabel symbolLabel;
    // End of variables declaration                   
}

无论我在 jinstrument jcombobox 中选择什么，我都会得到“inside if”作为输出。我已经检查了 print 语句，但 Enterloop 的值为 0，它仍然进入 if 语句 block 。请帮我解决这个问题

Answer 1

这一行有一个; if(enterloop == 1);

; 表示语句结束。因此，即使 if 语句返回 false，也会执行下一行