public void num_actionPerformed(ActionEvent e) {
FocusManager.getCurrentManager().focusNextComponent(e.getSource());
}显示 FocusManager 有错,请问是怎么回事?
FocusManager.getCurrentManager().focusNextComponent(e.getSource());
}显示 FocusManager 有错,请问是怎么回事?
FocusManager.getCurrentManager().focusNextComponent(e.getSource());
}
class STUFrame1_num_actionAdapter implements ActionListener {
private STUFrame1 adaptee;
STUFrame1_num_actionAdapter(STUFrame1 adaptee) {
this.adaptee = adaptee;
} public void actionPerformed(ActionEvent e) {
adaptee.num_actionPerformed(e);
}
}错误的信息是:红线在 FocusManager 下,显示:con't find symbol:variable FocusManager,location:class stu,STUFrame1;
import javax.swing.FocusManager;
那才是原汁原味!
请问这是怎么会事呢?我导入的包有:import javax.swing.FocusManager;
import java.awt.event.FocusEvent;import java.awt.event.ActionEvent;
是不是我还有什么包没有导入呢?
import java.awt.event.ActionListener;
试试
function aa(){
if (event.keyCode==13){
event.keyCode=9;
}
}
</script><body onkeydown="aa()">