You can easily set any system properties in java using System.setPropoerty method, However it may not have any effect in case of CLASSPATH property. This is mainly because the Java system class loader is initialized very early in the JVM startup sequence. The class loader copies the classpath into its own data structures, and the classpath property is not read again. Therefore changing it after its already copied does not affect anything. There are mainly two reasons for this –…

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This can be done in two simple ways   Using ClassLoader.getResourceAsStream This method can be used to load any file from CLASSPATH InputStream in =this.getClass().getClassLoader().getResourceAsStream(“MyFile.txt”);   Using Class.getResourceAsStream This method can be used to load files using relative path to the package of the class InputStream in =this.getClass().getResourceAsStream(“SomeTextFile.txt”);   This method can also be used to load any files from CLASSPATH by prefixing a “/”