当想要使用鼠标适配器类获得鼠标点击计数并出现如下错误时,我遇到了问题:
线程“AWT-EventQueue-0”中的异常java.util.FormatFlagsConversionMismatchException:Conversion = c,Flags =
at java.util.Formatter $ FormatSpecifier.failMismatch(Unknown Source)
at java.util.Formatter $ FormatSpecifier.checkBadFlags(Unknown Source)
at java.util.Formatter $ FormatSpecifier.checkCharacter(Unknown Source)
at java.util.Formatter $ FormatSpecifier。(Unknown Source)
在java.util.Formatter.parse(未知来源)
at java.util.Formatter.format(Unknown Source)
at java.util.Formatter.format(Unknown Source)
在java.lang.String.format(未知来源)
at practice2.window12 $ Mouseclass.mouseClicked(window12.java:20)
at java.awt.Component.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
在java.awt.Window.processEvent(未知来源)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
在java.awt.EventQueue.access $ 200(未知来源)
在java.awt.EventQueue $ 3.run(未知来源)
在java.awt.EventQueue $ 3.run(未知来源)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain $ 1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain $ 1.doIntersectionPrivilege(Unknown Source)
在java.awt.EventQueue $ 4.run(未知来源)
在java.awt.EventQueue $ 4.run(未知来源)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain $ 1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
在java.awt.EventDispatchThread.run(未知来源)`
package practice2;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class window12 extends JFrame{
private String details;
private JLabel statusbar;
public window12(){
super("this will be title");
setVisible(true);
setSize(400,400);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
statusbar=new JLabel("this will be defalt");
add(statusbar,BorderLayout.SOUTH);
addMouseListener(new Mouseclass());
}
private class Mouseclass extends MouseAdapter{
public void mouseClicked(MouseEvent event){
details=String.format("you clicked % `enter code here`clicks",event.getClickCount());
if(event.isMetaDown()){
details+=" with right button";
}
else if(event.isAltDown()){
details+=" with center button";
}
else{
details+=" with left button";
}
statusbar.setText(details);
}
}
public static void main(String[] args){
new window12();
}
}
答案 0 :(得分:1)
异常消息是问题的一个很好的指示 - 您需要使用格式说明符
details = String.format("you clicked %d", event.getClickCount());
阅读javadoc
答案 1 :(得分:0)
这个
details=String.format("you clicked % `enter code here`clicks",event.getClickCount());
应该是
details=String.format("you clicked %d `enter code here`clicks",event.getClickCount());
注意de%d
答案 2 :(得分:0)
您缺少格式说明符%d
:
details = String.format("you clicked %d",event.getClickCount();