import javax.swing.*;
public class Hekk{
    public static void main(String[] args) {
        String chinese = "";
        String english = "";
        JOptionpane.showInputDialog("请输入您要翻译的英语!");
        if (english == "select" ) chinese = "选择";   
        else if (english == "result") chinese = "结果";
        else if (english == "width') chinese = "宽度";
        else if (english == 2) chinese = "左边";
        //else if (english == System.arraycopy) chinese = "拷贝命令";
        else chinese = ("你的输入不存在！");   
        JOptionPane.showMessageDialog(null , chinese);
  System.exit(0);
    }
}
这程序有误，请各位朋友帮我修改正。。谢谢···

import javax.swing.*;

public class Hekk {
    public static void main(String[] args) {

        String chinese, english;
        english = JOptionPane.showInputDialog("请输入您要翻译的英语!");

        if (english.equals("select"))
            chinese = "选择";
        else if (english.equals("result"))
            chinese = "结果";
        else if (english.equals("width"))
            chinese = "宽度";
        else if (english.equals("2"))
            chinese = "左边";
        else if (english.equals("System.arraycopy"))
            chinese = "拷贝命令";
        else
            chinese = ("你的输入不存在！");
        JOptionPane.showMessageDialog(null, chinese);
        System.exit(0);
    }
}

楼主是不是想要这种结果。。。

LS正解， String内容比较是用equals

谢谢···以后多多请教！！
字符串的都要用equals来表示相等的？？

==是对对象的地址进行比较的，而String中的equals()方法是重写了Object类的equals（）方法，并且实现为对String对象的内容的比较

受教了