gui中的工具提示不顯示？

Question

我正在使用.setToolTipText組件，以便將鼠標懸停在窗口上時會顯示文本“當您將鼠標懸停在它上面時會顯示”。 目前，除工具提示外，其他所有功能均正常。 現在，工具提示僅在將鼠標懸停在單詞上方時才會顯示，每當我將鼠標懸停在窗口上方時如何顯示？ 這是代碼：

這是主要的類：

import javax.swing.JFrame;

class evenmoregui{
public static void main (String[ ] args){

    moregui guiobject = new moregui();
    guiobject.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //Makes the program terminate when the x is clicked
    guiobject.setSize(275,180); //This is the size
    guiobject.setVisible(true); //Means it should show up, actually puts the window on screen
}


}

這是帶有實際.setToolTip部分的類：

import java.awt.FlowLayout; //Make it so the windows don't overlap, it just formats the windows properly
import javax.swing.JFrame;  //Gives you all the windows features in the window, like minimize 
import javax.swing.JLabel;  //Allows text and simple images on window

public class moregui extends JFrame { //JFrame gives you all the basic windows features.
private JLabel item1;

public moregui(){ //Constructor
    super("This is the title bar"); //These are all imported methods


    setLayout(new FlowLayout()); //Gives default layout


    item1 = new JLabel("This is a sentence"); //Text on the screen


    item1.setToolTipText("This will show up when you hover over it");


    add(item1); //Adds item1 into window
                  }


                                 }

Answer 1

嘗試添加getRootPane（）。setToolTipText（“ String”）; 這將確保將鼠標懸停在JFrame上時顯示工具提示

import java.awt.FlowLayout;    
import javax.swing.JFrame; window, like minimize 
import javax.swing.JLabel; 
public class moregui extends JFrame{ 
private JLabel item1;
public moregui(){                 //Constructor
super("This is the title bar"); //These are all imported methods
getRootPane().setToolTipText("Hovering over window");
setLayout(new FlowLayout()); //Gives default layout
item1 = new JLabel("This is a sentence"); //Text on the screen
item1.setToolTipText("This will show up when you hover over it");
add(item1); //Adds item1 into window
}
}

Answer 2

這是正確的代碼。 嘗試將鼠標懸停更長的時間。

JPanel panel = new JPanel();
        panel.setToolTipText("ToolTIp");
        contentPane.add(panel, BorderLayout.NORTH);

        JLabel lblLabel = new JLabel("Label");
        panel.add(lblLabel);

如果您遇到其他問題，請告訴我。