xieziban.java

简单写字板,可以任意地设置字体,字号,字颜色.

import java.awt.*;
import java.applet.Applet;
import java.awt.event.*;
public class Xieziban extends Applet implements ItemListener
{
  TextArea ta1=new TextArea("cccc",4,40);
  CheckboxGroup cbg=new CheckboxGroup();
  Checkbox cbg1=new Checkbox("红色",cbg,true);
  Checkbox cbg2=new Checkbox("绿色",cbg,false);
  Checkbox cbg3=new Checkbox("蓝色",cbg,false);
  Checkbox cbg4=new Checkbox("黄色",cbg,false);
  Choice c1=new Choice();
  Checkbox cb1=new Checkbox("粗体");
  Checkbox cb2=new Checkbox("斜体");
  Panel p1=new Panel();
  Panel p2=new Panel();
  Panel p3=new Panel(); 
  Panel p4=new Panel();
  Color c=Color.red;
  int Style=Font.PLAIN;
  String fontNames="Arial";
  int i=30;
 public void init()
 {
  setLayout(new GridLayout(4,1));
  add(p1);
  p1.add(cbg1);
  p1.add(cbg2);
  p1.add(cbg3);
  p1.add(cbg4);
  add(p2);
  p2.add(cb1);
  p2.add(cb2);
  add(p3);
  p3.add(c1);
  c1.addItem("宋体");
  c1.addItem("楷体");
  c1.addItem("黑体");
  c1.addItem("TimesRoman");
  add(p4);
  p4.add(ta1);
  ta1.setForeground(c);
  //ta1.setFont(new Font(fontNames,Style,30));
  cbg1.addItemListener(this);
  cbg2.addItemListener(this);
  cbg3.addItemListener(this);
  cbg4.addItemListener(this);
  cb1.addItemListener(this);
  cb2.addItemListener(this);
  c1.addItemListener(this);
 }
 public void itemStateChanged(ItemEvent e)
 {
  if(e.getSource()==c1)
  ta1.setFont(new Font(c1.getSelectedItem(),Style,30));
  if(e.getSource()==cbg1)
  ta1.setForeground(Color.red);
  if(e.getSource()==cbg2)
  ta1.setForeground(Color.green);
  if(e.getSource()==cbg3)
  ta1.setForeground(Color.blue);
  if(e.getSource()==cbg4)
  ta1.setForeground(Color.yellow); 
  if((cb1.getState())&&(!cb2.getState()))
  Style=Font.BOLD;
  if((cb2.getState())&&(!cb1.getState()))
  Style=Font.ITALIC;
  if((!cb1.getState())&&(!cb2.getState()))
  Style=Font.PLAIN;
  if((cb1.getState())&&(cb2.getState()))
  Style=Font.BOLD+Font.ITALIC;
  ta1.setFont(new Font(c1.getSelectedItem(),Style,30));
 }
}