?????????????????????????????????????????????JDBC?????????????????(??????????????????????????????????????????????????)
????Try…finally??????????????????????Ρ???????????????й????л???????????????????????????????????try?????”????”??????а?????????finally?н???????????????????????
????public void readFile(){
????BufferedReader reader=null;
????try{
????reader=new BufferedReader(new InputStreamReader(
????new FileInputStream("file")));
????//do some other work
????//close reader
????reader.close();
????}catch(FileNotFoundException e){
????e.printStackTrace();
????}catch(IOException e){
????e.printStackTrace();
????}
????}
????????????????????????????????????????????????????????????????reader???????????????Υ???????reader.close()???????????????????????????????????κ???????????????????????????????????????????????(?????????????????????)??????????????try…finally??????
????public void readFile(){
????BufferedReader reader=null;
????try{
????try{
????reader=new BufferedReader(new InputStreamReader(
????new FileInputStream("file")));
????//do some other work
????//close reader
????}finally{
????reader.close();
????}
????}catch(FileNotFoundException e){
????e.printStackTrace();
????}catch(IOException e){
????e.printStackTrace();
????}
????}
??????????????????????????????????????????????????????????????????try…finally???????????(??????鷳??java??????й??о?)??
???????????????????????????????д?????????????????JDBC????????????????????????????????????????????????????м?????????????????????????????????????????????????????????
????public class ResourceInConstructor{
????BufferedReader reader=null;
????public ResourceInConstructor(){
????try{
????reader=new BufferedReader(new InputStreamReader(new FileInputStream("")));
????}catch(FileNotFoundException e){
????e.printStackTrace();
????}
????}
????public void readFile(){
????try{
????while(reader.readLine()!=null){
????//do some work
????}
????}catch(IOException e){
????e.printStackTrace();
????}
????}
????public void dispose(){
????try{
????reader.close();
????}catch(IOException e){
????e.printStackTrace();
????}
????}
????}
??????????????????????????????????????????????????????java?л????к???????????????