Example Analysis of inputstreamreader

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After the inputstreamreader program creates or allocates resources, it does not release resources properly, which will result in inappropriate resource release defects. In a busy program environment, the Java virtual machine may not be able to effectively use the Icano object.

Inputstreamreader defect sample

In the following Java method, the finalize O-stream object is not properly released after creation, and the program relies on the garbage collection mechanism of the Java virtual machine to release the Imax O-stream resources. in fact, the program cannot determine when to call the virtual machine's finalize () method. In a busy program environment, the Java virtual machine may not be able to effectively use the Icano object.

PublicvoidprocessFile (StringfilePath) {try {FileInputStreamfis=newFileInputStream (filePath); InputStreamReaderisr=newInputStreamReader (fis); BufferedReaderbr=newBufferedReader (isr); Stringline= ""; while ((line=br.readLine ())! = null) {processLine (line);}} catch (FileNotFoundExceptione) {log (e);} catch (IOExceptione) {log (e);}}

PublicvoidprocessFile (StringfilePath) {

Try {

FileInputStreamfis=newFileInputStream (filePath)

InputStreamReaderisr=newInputStreamReader (fis)

BufferedReaderbr=newBufferedReader (isr)

Stringline= ""

While ((line=br.readLine ())! = null) {

ProcessLine (line)

}

} catch (FileNotFoundExceptione) {

Log (e)

} catch (IOExceptione) {

Log (e)

}

}

Inputstreamreader sample repair recommendations:

The Ibank O object should be released in the finally block.

PublicvoidprocessFile (StringfilePath) {FileInputStreamfis=null;InputStreamReaderisr=null;BufferedReaderbr=null;try {fis=newFileInputStream (filePath); isr=newInputStreamReader (fis); br=newBufferedReader (isr); Stringline= ""; while ((line=br.readLine ())! = null) {/ / processLine (line);}} catch (FileNotFoundExceptione) {/ / log (e);} catch (IOExceptione) {/ / log (e);} finally {if (brushed null) {try {br.close ();} catch (IOExceptione) {/ / log (e);} if (isrrabbit null) {try {isr.close () } catch (IOExceptione) {/ / log (e);}} if (fissure null) {try {fis.close ();} catch (IOExceptione) {/ / log (e);}

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