mycomparator.java

来自「3D手机游戏开发实例源代码」· Java 代码 · 共 29 行

//程序名DateRecordComparator.java，属于项目RMS_Ex7
//实现一个比较器，用于对日期排序
import java.io.*;
import javax.microedition.rms.*;

public class MyComparator implements RecordComparator {
  public int compare(byte[] rec1, byte[] rec2) {
	  try {
      DataInputStream din1 = 
        new DataInputStream(
          new ByteArrayInputStream(rec1));
      din1.reset();
      DataInputStream din2 = 
        new DataInputStream(
          new ByteArrayInputStream(rec2));
      din2.reset();

      if (din1.readInt() > din2.readInt()) {
        return FOLLOWS;
      } else if (din1.readInt() == din2.readInt()) {
        return EQUIVALENT;
      } else {
        return PRECEDES;
      }
    }catch (Exception e) {
    }
    return EQUIVALENT;
  }
}