Question

java 的jcombobox的取值

在循环语句中，我想取jcombobox的值，如jcombobox中有选项葡萄、香蕉、苹果等，我怎么样知道选择的是葡萄？另外不是在接口事件中判断，我需要的是在线程的执行过程中判断。
就和jradiobutton的isselect（）方法一样的，不知道jcombobox是不是也有这样的方法

Answer 1

import javax.swing.JComboBox;
import javax.swing.JFrame;

public class Test2 extends JFrame implements Runnable {

private JComboBox box;

public Test2() {
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

box = new JComboBox();
box.addItem("葡萄");
box.addItem("香蕉");
box.addItem("苹果");

this.add(box);
this.pack();
}

public static void main(String[] args) {
Test2 test = new Test2();
test.setVisible(true);
Thread t = new Thread(test);
t.start();
}

@Override
public void run() {
// TODO Auto-generated method stub
while (true) {
String value = (String) box.getSelectedItem();
System.out.println(value);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

}

Answer 2

(String)fruitCombo.getSelectedItem().equals("Grape")

Answer 3

String ret=jcombobox.getSelectedItem().toString();