----------Java编译器 ----------
UIBasicElement.java:11: cannot find symbol
symbol : method add(javax.swing.JLabel)
location: class UIBasicElement
add(new JLabel("What are you like: "));
^
UIBasicElement.java:12: cannot find symbol
symbol : class Checkbox
location: class UIBasicElement
add(new Checkbox("Apple "));
^
UIBasicElement.java:13: cannot find symbol
symbol : class Checkbox
location: class UIBasicElement
add(new Checkbox("orange "));
^
UIBasicElement.java:14: cannot find symbol
symbol : class Checkbox
location: class UIBasicElement
add(new Checkbox("Strawberry "));
^
UIBasicElement.java:15: cannot find symbol
symbol : class Checkbox
location: class UIBasicElement
add(new Checkbox("Peach "));
^
5 errors输出完成 (耗时 3 秒) - 正常终止
UIBasicElement.java:11: cannot find symbol
symbol : method add(javax.swing.JLabel)
location: class UIBasicElement
add(new JLabel("What are you like: "));
^
UIBasicElement.java:12: cannot find symbol
symbol : class Checkbox
location: class UIBasicElement
add(new Checkbox("Apple "));
^
UIBasicElement.java:13: cannot find symbol
symbol : class Checkbox
location: class UIBasicElement
add(new Checkbox("orange "));
^
UIBasicElement.java:14: cannot find symbol
symbol : class Checkbox
location: class UIBasicElement
add(new Checkbox("Strawberry "));
^
UIBasicElement.java:15: cannot find symbol
symbol : class Checkbox
location: class UIBasicElement
add(new Checkbox("Peach "));
^
5 errors输出完成 (耗时 3 秒) - 正常终止
public UIBasicElement() {
}
public static void main(String[] args) {
UIBasicElement UIBasicElement1 = new UIBasicElement();
add(new JLabel("What are you like: "));
add(new Checkbox("Apple "));
add(new Checkbox("orange "));
add(new Checkbox("Strawberry "));
add(new Checkbox("Peach "));
}}
试试!
不继承容器类就用add方法往里面加东西?
你自己的类中也没定义静态的add方法阿!怎么可能上来就用add()?
import java.awt.*;
public class UIBasicElement extends JFrame{
public UIBasicElement() {
}
public static void main(String[] args) {
UIBasicElement UIBasicElement1 = new UIBasicElement();
UIBasicElement1.getContentPane().setLayout(new FlowLayout());
UIBasicElement1.getContentPane().add(new JLabel("What are you like: "));
UIBasicElement1.getContentPane().add(new Checkbox("Apple "));
UIBasicElement1.getContentPane().add(new Checkbox("orange "));
UIBasicElement1.getContentPane().add(new Checkbox("Strawberry "));
UIBasicElement1.getContentPane().add(new Checkbox("Peach "));
UIBasicElement1.setSize(400,400);
UIBasicElement1.setVisible(true);
}}可以是可以了,不过和书上差的很远,这是什么书啊?
{
public UIBasicElement()
{
add(new JLabel("What are you like: "));
add(new Checkbox("Apple "));
add(new Checkbox("orange "));
add(new Checkbox("Strawberry "));
add(new Checkbox("Peach "));
}
public static void main(String[] args)
{
UIBasicElement UIBasicElement1 = new UIBasicElement();
UIBasicElement1.setSize(400, 250);
UIBasicElement1.setVisible(true);
}}