Java 用vaadin6实现手风琴
我是Java新手,修过Java基础课程。目前,我正在使用vaadin作为我的框架来创建一个简单的webapp,但在实现accordion时遇到了问题。我希望在我的代码中有一些指针,在主应用程序中将accordion转换为组件时出错 我目前的代码: 主java类:Java 用vaadin6实现手风琴,java,vaadin,Java,Vaadin,我是Java新手,修过Java基础课程。目前,我正在使用vaadin作为我的框架来创建一个简单的webapp,但在实现accordion时遇到了问题。我希望在我的代码中有一些指针,在主应用程序中将accordion转换为组件时出错 我目前的代码: 主java类: package Main; import UI.Accordiontest; import com.vaadin.ui.SplitPanel; import com.vaadin.ui.VerticalLayout; import co
package Main;
import UI.Accordiontest;
import com.vaadin.ui.SplitPanel;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;
public class test extends Application {
private SplitPanel horizontalSplit = new SplitPanel(
SplitPanel.ORIENTATION_HORIZONTAL);
private Accordiontest accordion = new Accordiontest(this);
public void init() {
buildMainLayout();
}
private void buildMainLayout () {
// error: cast accordion to Component
horizontalSplit.setFirstComponent(accordion);
//error end
setMainWindow(new Window("test))'
VerticalLayout layout = new VerticalLayout();
layout.setSizeFull();
layout.addComponent(horizontalSplit);
layout.setExpandRatio(horizontalSplit, 1);
getMainWindow().setContent(layout);
UI手风琴测试:
软件包界面
import Main.test;
import com.vaadin.ui.Accordion;
import com.vaadin.ui.Label;
public class Accordiontest extends test{
public Accordiontest(test app) {
final Accordion accordion = new Accordion();
for (int i = 0; i < 5;
i++) {
VerticalLayout layout = new VerticalLayout();
accordion.addCOmponent(layout);
layout.setCaption("tab" + (i + 1));
Label label = new Label("These are the contents of Tab " + (i + 1) + ".");
layout.addComponent(label);
TextField textfield = new TextField("some text field");
layout.addComponent(textfield);
}
}
}
谢谢 您想做什么,是否只想在页面中添加手风琴?代码中有一些逻辑错误。 在错误行:horizontalSplit.setFirstComponentaccordion; 您正在尝试添加accordion,它是Accordiontest类型的对象,它扩展了测试类,该测试类是您的应用程序类,当然它不是一个组件 因此,您的继承层次结构存在问题。但如果您只想将该手风琴添加到应用程序中,您可以执行以下操作:
package Main;
import UI.Accordiontest;
import com.vaadin.ui.SplitPanel;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;
public class test extends Application {
private SplitPanel horizontalSplit = new SplitPanel(
SplitPanel.ORIENTATION_HORIZONTAL);
private Accordiontest accordion = new Accordiontest();
public void init() {
buildMainLayout();
}
private void buildMainLayout () {
// No more casting errors because accordion extends Accordion which is component
horizontalSplit.setFirstComponent(accordion);
setMainWindow(new Window("test))'
VerticalLayout layout = new VerticalLayout();
layout.setSizeFull();
layout.addComponent(horizontalSplit);
layout.setExpandRatio(horizontalSplit, 1);
getMainWindow().setContent(layout);
}
}
那么
创建标签时,我遇到了麻烦。在Accordiontest类中,我添加了标签1=新标签1;
import Main.test;
import com.vaadin.ui.Accordion;
public class Accordiontest extends Accordion {
public Accordiontest() {
super();
for (int i = 0; i < 5; i++) {
TextField textfield = new TextField("some text field");
addTab(textfield, "Tab" + (i+1), null);
}
}
}