import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.rms.*;
public class RecordDataBase extends MIDlet{
static final String DBNAME ="RecordDataBase";
public void startApp(){
RecordStore rs =null;
try{
RecordStore.deleteRecordStore(DBNAME);
}catch(Exception e){}
try{
rs =RecordStore.openRecordStore(DBNAME,true);
byte[] data1 ="First Record".getBytes();
byte[] data2 ="Second Record".getBytes();
byte[] data3 =" Third Record".getBytes();
data3[0]=0;
data3[data3.length-1]=(byte)-1;
rs.addRecord(data1,0, data1.length);
rs.addRecord(data2,0, data2.length);
rs.addRecord(data3,0, data3.length);
storeData(rs,System.out);
rs.closeRecordStore();
}catch(RecordStoreException e){
System.out.println(e);
}
notifyDestroyed();
}
public void pauseApp(){}
public void destroyApp(boolean unconditional){}
public void storeData(RecordStore rs,PrintStream out){
if(rs ==null)return;
StringBuffer hexLine =newStringBuffer();
StringBuffer charLine =newStringBuffer();
try{
int lastID = rs.getNextRecordID();
byte[] data =newbyte[100];
int size;
for(int i =1; i < lastID;++i){
try{
size = rs.getRecordSize(i);
if(size > data.length){
data =newbyte[size *2];
}
out.println("-------------------------------------");
out.println("Size = "+ size);
out.println("-----------------------------------");
rs.getRecord(i, data,0);
storeRecord(data, size, out, hexLine, charLine,16);
out.println(" ");
}catch(InvalidRecordIDException e){
continue;
}
}
}catch(RecordStoreException e ){
out.println(e);
}
}
private void storeRecord(byte[] data,int size,PrintStream out, StringBuffer hexLine,StringBuffer charLine,int maxLen ){
if(size ==0)return;
hexLine.setLength(0);
charLine.setLength(0);
int count =0;
for(int i =0; i < size;++i){
char b =(char)(data[i]&0xFF);
if(b <0x10){
hexLine.append('0');
}
hexLine.append(Integer.toHexString(b));
hexLine.append(' ');
if((b >=32&& b <=127)|| Character.isDigit(b)|| Character.isLowerCase(b)|| Character.isUpperCase(b)){ charLine.append((char)b);
}else{
charLine.append(' ');
}
if(++count >= maxLen || i == size-1){
while(count++< maxLen){ hexLine.append(" ");
}
hexLine.append(' ');
hexLine.append(charLine.toString());
out.println( hexLine.toString());
hexLine.setLength(0);
charLine.setLength(0);
count =0;
}
}
}
}