如何在构造函数中命名JFrame [英] How to name JFrame in a constructor

问题描述

问题可能与您预期的有所不同，但是我正在为JFrames创建一个实用程序函数，以使将来对我来说更容易.

Question may be different than what you expected, but I'm creating a utility function for JFrames to make it easier for future me.

public void setJframe(String title, int w,int h, JFrame name, Boolean maximize){
    name.setSize(w, h);
    name.setTitle(title);

    if (maximize == true) {
        name.setExtendedState(name.getExtendedState()|JFrame.MAXIMIZED_BOTH);
    } else {
        name.setLocationRelativeTo(null);
    }
}

我希望能够在输入参数时为JFrame命名.此刻，当我输入一个字符串时，它只会吐出一个错误，提示我不能使用字符串?我希望名称"像一个字符串变量，在其中可以输入字符串值并将对象命名为该变量.

I want the ability to name the JFrame as I type in the parameters. At the moment, when I type in a string it simply spits out an error saying I can't use a string? I want "name" to be like a string variable where I can type in a string value and have the object be named that.

编辑:需要使问题更清楚...

Need to make the question more clear...

PackageName.setJframe("Title of the Frame", 500, 800, f, false);

返回此错误:

线程"main"中的异常java.lang.Error:未解决的编译问题:

Exception in thread "main" java.lang.Error: Unresolved compilation problems:

f无法解决

f cannot be resolved

f无法解决

在gui.GuiMain.guiSet(GuiMain.java:17)

at gui.GuiMain.guiSet(GuiMain.java:17)

在urAPackage.Main.main(Main.java:8)

at urAPackage.Main.main(Main.java:8)

Eclipse表示方法f不适用于构造函数

Eclipse says method f is not applicable to constructor

推荐答案

使用方法setJframe，您只需要将实例化的新JFrame传递给第四参数，如下所示:

Using your method, setJframe, you simply need to pass an instantiated new JFrame into the forth parameter as such:

import java.awt.EventQueue;
import javax.swing.JFrame;

public class CreateJFrame {

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    JFrame frame1 = new JFrame();
                    setJframe("Title of the first Frame", 500, 800, frame1, false);
                    frame1.setVisible(true);

                    JFrame frame2 = new JFrame();
                    setJframe("Title of the second Frame", 100, 200, frame2, false);
                    frame2.setVisible(true);

                    JFrame frame3 = new JFrame();
                    setJframe("Title of the third Frame", 100, 200, frame3, true);
                    frame3.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public static void setJframe(String title, int w, int h, JFrame name, Boolean maximize) {
        name.setSize(w, h);
        name.setTitle(title);

        if (maximize == true) {
            name.setExtendedState(name.getExtendedState() | JFrame.MAXIMIZED_BOTH);
        } else {
            name.setLocationRelativeTo(null);
        }
    }
}

如果希望第四个参数为字符串，则可以扩展JFrame并指定其他构造函数以接受该字符串，也可以创建一个方法以返回JFrame对象.

If you want the forth parameter to be a string, you could either extend a JFrame and specify your additional constructor(s) to accept the string, or you can create a method whereby a JFrame object is returned.

当然，除非您是要命名内部变量名称.运行时无法使用此功能.无论如何我都无法想象这种功能有什么用.上一段假设您的意思是设置JFrame的名称(通过setName()).

Unless of course, you meant naming the internal variable name. This functionality is not possible during runtime. I can't imagine any use for such a function anyways. The above paragraph assumes you mean setting the name of a JFrame (via setName()).

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