线程啊晕了真的好晕,该怎么处理

线程啊_晕了真的好晕

Java code

package com.net;import javax.swing.SwingUtilities;public class fdsfsd {    public static void main(String[] args) {    }    public void first() {        SwingUtilities.invokeLater(new Runnable() {            public void run() {                Thread thread = new Thread(new Runnable() {                    public void run() {                        //我在刷新文件夹呢                    }                });            }        });    }    public void second() {        SwingUtilities.invokeLater(new Runnable() {            public void run() {                Thread thread = new Thread(new Runnable() {                    public void run() {                    }                });            }        });    }}

Java code

import javax.swing.SwingUtilities;public class fdsfsd {    public static void main(String[] args) {        new fdsfsd().first();    }    public void first() {        SwingUtilities.invokeLater(new Runnable() {            public void run() {                System.out.println("我显示了");                Thread thread = new Thread(new Runnable() {                    public void run() {                        System.out.println("到里面的run了");                        try {                            Thread.sleep(4000);                        } catch (InterruptedException e) {                        }                        System.out.println("我等一会显示");                        //我在刷新文件夹呢                    }                });            }        });    }}