Java程序图形用户界面设计之标签组件

import javax.swing.*;
import java.awt.*;

public class Hello {
    public static void main(String[] args) {
        JFrame frame = new JFrame("一");
        JLabel label = new JLabel("HELLO",JLabel.CENTER);
        frame.add(label);
        Dimension d = new Dimension();
        d.setSize(500,600);
        frame.setSize(d);
        frame.setBackground(Color.black);
        Point point = new Point(300,200);
        frame.setLocation(point);
        frame.setVisible(true);
    }
}

public void setFont(Font t)

import javax.swing.*;
import java.awt.*;

public class Hello {
    public static void main(String[] args) {
        JFrame frame = new JFrame("一");
        JLabel label = new JLabel("HELLO",JLabel.CENTER);
        Font font = new Font("Serief",Font.ITALIC+Font.BOLD,28);
        label.setFont(font);
        label.setForeground(Color.BLUE);
        frame.add(label);
        Dimension d = new Dimension();
        d.setSize(500,600);
        frame.setSize(d);
        frame.setBackground(Color.black);
        Point point = new Point(300,200);
        frame.setLocation(point);
        frame.setVisible(true);
    }
}

import javax.swing.*;
import java.awt.*;
import java.io.File;

public class Hello {
    public static void main(String[] args) {
        JFrame frame = new JFrame("一");
        String picPath = "C:\\Users\\30452\\Desktop\\123.jpg";
        Icon icon = new ImageIcon(picPath);
        JLabel lab = null;
        lab = new JLabel(icon,JLabel.CENTER);
        frame.add(lab);
        frame.setSize(800,800);
        frame.setBackground(Color.WHITE);
        frame.setLocation(300,200);
        frame.setVisible(true);
    }
}