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Update Release Notes

Java™ SE Development Kit 6, Update 45 (JDK 6u45)

The full version string for this update release is 1.6.0_45-b06 (where "b" means "build") and the version number is 6u45.

Olson Data 2012i

JDK 6u45 contains Olson time zone data version 2012i. For more information, refer to Timezone Data Versions in the JRE Software.

Security Baselines

The security baselines for the Java Runtime Environment (JRE) at the time of the release of JDK 6u45 are specified in the following table:

JRE Family Version JRE Security Baseline (Full Version String)
6 1.6.0_45
5.0 1.5.0_45

For more information about security baselines, see Deploying Java Applets With Family JRE Versions in Java Plug-in for Internet Explorer.

Changes to RMI

From this release, the RMI property java.rmi.server.useCodebaseOnly is set to true by default. In previous releases the default value was false.

This change of default value may cause RMI-based applications to break unexpectedly. The typical symptom is a stack trace that contains a java.rmi.UnmarshalException containing a nested java.lang.ClassNotFoundException.

For more information, see RMI Enhancements.

Changes to Runtime.exec

On Windows platform, the decoding of command strings specified to Runtime.exec(String), Runtime.exec(String,String[]) and Runtime.exec(String,String[],File) methods, has been improved to follow the specification more closely. This may cause problems for applications that are using one or more of these methods with commands that contain spaces in the program name, or are invoking these methods with commands that are not quoted correctly.

For example, Runtime.getRuntime().exec("C:\\My Programs\\foo.exe bar") is an attempt to launch the program "C:\\My" with the arguments "Programs\\foo.exe" and "bar". This command is likely to fail with an exception to indicate "C:\My" cannot be found.

The example Runtime.getRuntime().exec("\"C:\\My Programs\\foo.exe\" bar") is an attempt to launch the program "\"C:\\My". This command will fail with an exception to indicate the program has an embedded quote.

Applications that need to launch programs with spaces in the program name should consider using the variants of Runtime.exec that allow the command and arguments to be specified in an array.

Alternatively, the preferred way to create operating systems processes since JDK 5.0 is using java.lang.ProcessBuilder. The ProcessBuilder class has a much more complete API for setting the environment, working directory and redirecting streams for the process.

Auto-download of JRE through JNLP Disabled

Prior to the release of JDK 6u45, the ability to automatically download a JRE through JNLP was disabled at the web server on Windows platform.

Bug Fixes

This release contains fixes for security vulnerabilities. For more information, see Oracle Java SE Critical Patch Update Advisory.