import javax.swing.*;

class jFrame extends JFrame {
    public jFrame (String title, int x, int y, int width, int height) {
        super(title);                     //調(diào)用父類構(gòu)造方法設(shè)置標(biāo)題
        setBounds(x, y, width, height);   //一步到位把位置和大小設(shè)置好
        setVisible(true);                 //設(shè)置窗口可見性
        setDefaultCloseOperation(EXIT_ON_CLOSE);  //設(shè)置關(guān)閉方式
    }
}
public class test {
    public static void main(String[] args) {
        jFrame frame = new jFrame("frame",100,100,500,500);
    }
}

import javax.swing.*;

class jFrame extends JFrame {
    public jFrame (String title, int x, int y, int width, int height) {
        super(title);                     //調(diào)用父類構(gòu)造方法設(shè)置標(biāo)題
        setBounds(x, y, width, height);   //一步到位把位置和大小設(shè)置好
        setVisible(true);                 //設(shè)置窗口可見性
        setDefaultCloseOperation(EXIT_ON_CLOSE);  //設(shè)置關(guān)閉方式

        JLabel jLabel = new JLabel("這是一個(gè)帶有標(biāo)題的窗口");//這是一個(gè)標(biāo)簽組件
        jLabel.setHorizontalAlignment(SwingConstants.CENTER); //設(shè)置文本位置
        add(jLabel);                       //調(diào)用add函數(shù)將標(biāo)簽組件添加到抽口當(dāng)中

    }
}
public class test {
    public static void main(String[] args) {
        jFrame frame = new jFrame("frame",100,100,500,500);
    }
}

import javax.swing.*;
import java.awt.*;
public class test {
    public static void main(String[] args) {
        JFrame jFrame = new JFrame("jFrame");
        jFrame.setBounds(300,300,500,500);
        jFrame.setVisible(true);
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Label label = new Label("label");
        jFrame.add(label);
    }
}