Try with multiple Resource in Java
Try with resources can be used with multiple resources by declaring them all in the try
block and this feature introduced in java 7 not in java 8 If you have multiple you can give like below
try (
java.util.zip.ZipFile zf =
new java.util.zip.ZipFile(zipFileName);
java.io.BufferedWriter writer =
java.nio.file.Files.newBufferedWriter(outputFilePath, charset)
) {
// Enumerate each entry
for (java.util.Enumeration entries =
zf.entries(); entries.hasMoreElements();) {
// Get the entry name and write it to the output file
String newLine = System.getProperty("line.separator");
String zipEntryName =
((java.util.zip.ZipEntry)entries.nextElement()).getName() +
newLine;
writer.write(zipEntryName, 0, zipEntryName.length());
}
}
In this example, the try-with-resources
statement contains two declarations that are separated by a semicolon: ZipFile and BufferedWriter. When the block of code that directly follows it terminates, either normally or because of an exception, the close methods of the BufferedWriter and ZipFile objects are automatically called in this order. Note that the close methods of resources are called in the opposite order of their creation..
Please see documentation for more info
en Lopes
Cullons, David, un altre nullpointer ! vols dir que és normal tants nullpointers ????? Però si peta més que una escopeta de fira La Mercedes agafarà una emprenyada de 1000 dimonis !
Updated on December 11, 2020Comments
-
en Lopes over 3 years
I am new in
Java8
, and I want to know if, for theAutoCloseable
resource, I have to add atry
for eachresource
, or it will work with the code abovetry (Connection conn = getConnection();) { Statement stmt = conn.createStatement(); ResultSet rset = stmt.executeQuery(sql); while (rset.next()) { TelefonicaDataVO vo = new TelefonicaDataVO(); vo.setTelefonicaDataId(rset.getString("Telefonica_PSD_ID")); vo.setReceptionDate(nvl(rset.getTimestamp("CREATION_DATE"))); vo.setMessage(nvl(rset.getString("MESSAGE"))); ret.add(vo); } }