JNI GetFieldID属性类型的判断

public class INFO {
short backup_type;		//备份的方式
int intervel;
String reserved_char;	//保留字符，留作以后扩展

INFO() {
backup_type = 0;
intervel = 0;
reserved_char =  null;
}
}

Compiled from "INFO.java"
public class com.android.myjni.INFO extends java.lang.Object{
short backup_type;
Signature: S
int intervel;
Signature: I
java.lang.String reserved_char;
Signature: Ljava/lang/String;
com.android.myjni.INFO();
Signature: ()V
}