import java.io.*;
import java.awt.*;
import java.awt.event.*;
public class quiz2 extends Frame implements ItemListener, ActionListener{
Label label1 = new Label("Please Choose one");
Checkbox sugar = new Checkbox ("Sugar");
Checkbox candy = new Checkbox ("Candy");
Button sum = new Button ("Clear");
public quiz2(){
setSize (200,200);
setLocation (100,100);
setTitle ("Example");
setLayout (null);
setResizable (false);
setVisible (true);
label1.setBounds (20,20,120,20);
add(label1);
CheckboxGroup sweets = new CheckboxGroup();
sugar.setBounds(20,40,120,20);
sugar.addItemListener(this);
add(sugar);
candy.setBounds(20,60,120,20);
candy.addItemListener(this);
add(candy);
sum.setBounds(20,80,50,30);
sum.addActionListener(this);
add(sum);}
public void itemStateChanged (ItemEvent item){
if (item.getSource()==sugar){
if (item.getStateChange()==ItemEvent.SELECTED){
setTitle ("You clicked sugar");}
else if (item.getStateChange()==ItemEvent.DESELECTED){
setTitle("You uncliked sugar");}}
else if (item.getSource()==candy){
if (item.getStateChange()==ItemEvent.SELECTED){
setTitle ("You clicked candy");}
else if (item.getStateChange()==ItemEvent.DESELECTED){
setTitle("You uncliked candy");}}}
public void actionPerformed (ActionEvent butt){
setTitle("Example");
candy.setSelected(false);
sugar.setSelected(false);}}
我发现的唯一的解决办法是checkbox.setSelected()
这在我的代码不会工作,我使用BlueJ的(因为我们学校使用它)。创建我的复选框清除/复位按钮(Java AWT)
按钮sum
的主要功能(忘记更改名称)是DESELECT
都sugar
和candy
无论他们是否被点击。
为什么setSelected()不能为你工作? –
我真的不明白它,但程序说“找不到符号 - 方法setSelected(布尔)” – jansuke
啊,我明白了。答案如下。 –