Java MIDlet 输入框实现-优快云博客

本文介绍了一个基于Java的MIDlet应用中实现输入框的具体方法。通过自定义`Entry`类继承`TextBox`并实现了`CommandListener`接口，文章详细展示了如何创建输入框、设置属性、响应命令以及与主界面的交互过程。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

import java.io.*;
import java.lang.*;
import java.util.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

public class Entry extends TextBox implements CommandListener{

private static MIDlet EntMid;
private static Canvas MainCnv;

public static String EntryName;
public static boolean isOpen;

// private static final int NAMEENTRY_LENGTH = 12;// English
private static final int NAMEENTRY_LENGTH = 6;// Chinese

private static Command cmdOk = new Command("ok",Command.BACK,0);

Entry( MIDlet mid, Canvas cnv, String name ){
  super("sdfsdf",name , NAMEENTRY_LENGTH , TextField.ANY );
  EntMid = mid;
  MainCnv = cnv;
}

public void Open(){
  isOpen = true;
  addCommand(cmdOk);
  Display.getDisplay( EntMid ).setCurrent(this);
  while( !this.isShown() ){
   try{Thread.sleep(100);}catch(Exception e){}
  }
  setCommandListener(this);
}

private void Close(){
  EntryName = getString();
//  removeCommand(cmdOk);
  Display.getDisplay(EntMid).setCurrent(MainCnv);
  isOpen = false;
}

public void commandAction(Command c,Displayable d){
  if( c == cmdOk ){
   Close();
  }
}

//.end class
}

inputEntry = new Entry( MID , this , recDefaultName );
        inputEntry.setString( recName[recPosition] );
        inputEntry.Open();
        while(inputEntry.isOpen){try{Thread.sleep(100);}catch(Exception E){}}
        soundResume();
        recDefaultName = inputEntry.EntryName;
        recName[recPosition] = inputEntry.EntryName;
        inputEntry = null;
        saveRecords();

输入中文的方法