Blog: mkyong (Yong Mook Kim) |
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408 blogs
updated: 20 min. ago
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In Java, we can get the keys and values via map.entrySet() Map map = new HashMap<>(); // Get keys and values for (Map.Entry entry : map.entr...
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Spring JdbcTemplate example to get a large ResultSet and process it. P.S Tested with Java 8 and Spring JDBC 5.1.4.RELEASE 1. Get large Resul...
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In Java, we can use Long.valueOf() to convert an Integer to a Long TestInteger.java package com.mkyong.example; public class TestInteger { p...
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Below example, the jdbcTemplate.queryForList returns an object of Integer and we try to convert it into a Long directly: public List findAll...
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In Java, we can combine RandomAccessFile and FileChannel to lock a file before writing. LockFileAndWrite.java package com.mkyong; import jav...
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In Java, we can use the Apache Commons IO ReversedLinesFileReader to read the last few lines of a File. pom.xml commons-io commons-io 2.6 1....
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In this tutorial, we will show you how to use Spring Boot JDBC SimpleJdbcCall to call a stored procedure and stored function from a Oracle d...
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In this tutorial, we will show you how to use Spring Boot JDBC JdbcTemplate and NamedParameterJdbcTemplat e. Technologies used : Spring Boot...
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As title, we can use flatMap to convert it. Java9Example1.java package com.mkyong.test; import java.util.Arrays; import java.util.List; impo...
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Java 8 stream and regular expression examples. Note Learn the basic regular expression at Wikipedia 1. String.matches(regex) 1.1 This exampl...
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