Java SwingWorkder使用实例

首先考虑的就是swing内部的 swingworkder对象，但是网上现成的例子不好找，主要参照了网上的资料，自己整理了一个。

注意：swingworkder对象只能执行一次，不能重复执行！例如点击开始，结束后，就不能再次开始了。

import java.awt.borderlayout;
import java.awt.event.*;
import java.beans.propertychangeevent;
import java.beans.propertychangelistener;
import java.util.list;
import java.util.concurrent.executionexception;
import javax.swing.*;
import javax.swing.swingworker;

public class swingworkersample {

    public static void main(string[] args) {

        // 外观定义
        try {
            uimanager
                    .setlookandfeel("com.sun.java.swing.plaf.nimbus.nimbuslookandfeel");
        } catch (exception ex) {
        }

        // 窗体
        jframe f = new jframe("swingworker sample");
        f.setdefaultcloseoperation(jframe.exit_on_close);

        // 表示区
        final jtextarea taoutput = new jtextarea(15, 30);
        jscrollpane sp = new jscrollpane(taoutput);
        f.add(sp);

        // 底部进度条
        final jprogressbar progressbar = new jprogressbar();
        f.add(borderlayout.south, progressbar);

        // 开始按钮
        jbutton b = new jbutton("开始");
        f.add(borderlayout.north, b);

        // 结束按钮
        jbutton b2 = new jbutton("结束");
        f.add(borderlayout.after_line_ends, b2);

        // swingworker类
        final swingworker<integer, int[]> sw = new swingworker<integer, int[]>() {

            /** 执行操作 */
            @override
            protected integer doinbackground() throws exception {

                int sum = 0;

                if (!this.iscancelled()) {

                    for (int i = 1; i <= 10; ++i) {
                        sum += i;
                        publish(new int[] { i, sum });// 调用表示中间结果
                        setprogress(i * 10);// 进度条
                        thread.sleep(1000);
                    }

                }
                return sum;
            }

            /** 表示中间结果 */
            @override
            protected void process(list<int[]> chunks) {
                stringbuilder sb = new stringbuilder();
                for (int[] values : chunks) {
                    sb.append(string.format("累加%d等于%d%n", values[0], values[1]));
                }
                taoutput.append(sb.tostring());
            }

            /** 处理完成 */
            @override
            protected void done() {

                if (this != null && !this.isdone()) {
                    try {
                        int result = get();
                        taoutput.append("完了。 合计" + result + "\n");
                    } catch (interruptedexception ex) {
                    } catch (executionexception ex) {
                    }
                }
            }

        };

        // 进度条表示
        sw.addpropertychangelistener(new propertychangelistener() {
            @override
            public void propertychange(propertychangeevent evt) {
                if ("progress".equals(evt.getpropertyname())) {
                    progressbar.setvalue((integer) evt.getnewvalue());
                }
            }
        });

        // 开始按钮事件
        b.addactionlistener(new actionlistener() {
            @override
            public void actionperformed(actionevent e) {

                sw.execute();// 异步调用swingworkder
            }
        });

        // 结束按钮
        b2.addactionlistener(new actionlistener() {
            @override
            public void actionperformed(actionevent e) {
                if (sw != null && !sw.isdone()) {
                    // cancel
                    sw.cancel(true);
                }

                joptionpane.showmessagedialog(null, "结束！");
            }
        });

        // 窗体表示
        f.pack();
        f.setvisible(true);
    }
}