sender.java

180个针对Java初学者的简单实例180个针对Java初学者的简单实例180个针对Java初学者的简单实例

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class Sender extends Applet implements ActionListener
{
	private String myName;
	private TextField nameField;
	private TextArea status;
	private String newline; //设置各种私有变量,用于表示各种信息
	public void init()
	{
		GridBagLayout gridBag=new GridBagLayout();
		GridBagConstraints c =new GridBagConstraints();
		setLayout(gridBag);
		Label receiverLabel=new Label("接收名称是:",Label.RIGHT);
		gridBag.setConstraints(receiverLabel,c);
		add(receiverLabel);//添加接收信息标签
		nameField=new TextField(getParameter("REVEIVERNAME"),10);
		c.fill=GridBagConstraints.HORIZONTAL;
		gridBag.setConstraints(nameField,c);
		add(nameField);
		nameField.addActionListener(this);
		Button button=new Button("发送信息");
		c.gridwidth=GridBagConstraints.REMAINDER;
		c.anchor=GridBagConstraints.WEST;
		c.fill=GridBagConstraints.NONE;
		gridBag.setConstraints(button,c);
		add(button);//添加按钮信息
		button.addActionListener(this);//添加按键事件
		status=new TextArea(5,60);
		status.setEditable(false);//设置状态栏
		c.anchor=GridBagConstraints.CENTER;
		c.fill=GridBagConstraints.BOTH;
		c.weightx=1.0;
		c.weighty=1.0;
		gridBag.setConstraints(status,c);
		add(status);
		myName=getParameter("NAME");//获得Applet的名字,此时"name"属性是在HTML页面上添加的
		Label senderLabel=new Label("(我的名字是 "+"<"+myName+">"+")",Label.CENTER);
		c.weightx=0.0;
		c.weighty=0.0;
		gridBag.setConstraints(senderLabel,c);
		add(senderLabel);//完成添加标签