实训要求：编写一个窗体程序，可以对文本区中的文字设置字体和大小。java

代码:jsp

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class FontChange extends JFrame implements ItemListener {

JComboBox fontName;

JComboBox fontSize;

JTextArea txtContent;

Font font;

final String[] fontArr;

final String strArr="老毕老王是影帝，\n"

+"老马不服其演技。\n"

+"没日没夜秀才艺，\n"

+"不知王毕已胜利。\n";

final String[] sizeArr={"8","9","10","12","14","16","18","20",

"24","28","32","36","40","44","48","54","60","66","72","80","88","1000"

};

public FontChange(){

super("改变字体");

txtContent=new JTextArea();

txtContent.setText(strArr);

JScrollPane jsp=new JScrollPane(txtContent);

GraphicsEnvironment env=GraphicsEnvironment

.getLocalGraphicsEnvironment();

fontArr=env.getAvailableFontFamilyNames();

fontName=new JComboBox(fontArr);

fontSize=new JComboBox(sizeArr);

fontSize.setPreferredSize(new Dimension(80,27));

fontName.addItemListener(this);

fontSize.addItemListener(this);

fontName.setSelectedItem("宋体");

fontSize.setSelectedItem("16");

FlowLayout layout=new FlowLayout(FlowLayout.CENTER,40,5);

JPanel pan=new JPanel(layout);

pan.add(fontName);

pan.add(fontSize);

Container c=this.getContentPane();

c.add(pan, BorderLayout.NORTH);

c.add(jsp,BorderLayout.CENTER);

this.setSize(1900,1000);

this.setResizable(false);

this.setVisible(true);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void itemStateChanged(ItemEvent e){

String s=(String)fontName.getSelectedItem();

int n=Integer.parseInt((String)fontSize.getSelectedItem());

font=new Font(s,Font.PLAIN,n);

txtContent.setFont(font);

}

public static void main(String[] args) {

// TODO Auto-generated method stub

new FontChange();

}

}

小结：终因而接触到图形用户界面了，这些东西不难可是很繁杂，要多敲，多练才能掌握。字体