How do I compile with -Xlint unchecked

Question

I m getting a message when I compile my code   Note  H  Project2 MyGui2 java uses unchecked or unsafe operations  Note  Recompile with -Xlint unchecked for details    How do I recompile with -Xlint unchecked

User · Answer

For Android Studio add the following to your top-level build gradle file within the allprojects block  tasks withType JavaCompile        options compilerArgs  lt  lt   -Xlint unchecked   lt  lt   -Xlint deprecation

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other way to compile using -Xlint unchecked through command line javac abc java -Xlint unchecked  it will show the unchecked and unsafe warnings

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A cleaner way to specify the Gradle compiler arguments follow  compileJava options compilerArgs     -Xlint unchecked   -Xlint deprecation

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In gradle project  You can added this compile parameter in the following way   gradle projectsEvaluated       tasks withType JavaCompile            options compilerArgs  lt  lt   -Xlint unchecked

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For IntelliJ 13 1  go to File -  Settings -  Project Settings -  Compiler -  Java Compiler  and on the right-hand side  for Additional command line parameters enter  -Xlint unchecked

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There is another way for gradle   compileJava       options compilerArgs  lt  lt   -Xlint unchecked   lt  lt   -Xlint deprecation

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FYI getting to these settings has changed for IntelliJ 15  new and improved for even deeper burial   Now it s  File   Other Settings   Default Settings    Build  Execution  Deployment    Compiler   Java Compiler   And in Additional command line parameters  same as before  write  -Xlint unchecked

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If you work with an IDE like NetBeans  you can specify the Xlint unchecked  compiler option in the propertys of your project   Just go to projects window  right click in the project and then click in Properties   In the window that appears search the Compiling category  and in the textbox labeled Additional Compiler Options set the Xlint unchecked option   Thus  the setting will remain set for every time you compile the project

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Specify it on the command line for javac      javac -Xlint unchecked   Or if you are using Ant modify your javac target     lt javac     gt       lt compilerarg value  -Xlint   gt     lt  javac gt     If you are using Maven  configure this in the maven-compiler-plugin    lt compilerArgument gt -Xlint unchecked lt  compilerArgument gt

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In CMD  write   javac -Xlint unchecked MyGui2 java   it will display the list of unchecked or unsafe operations

User · Answer

I know it sounds weird  but I m pretty sure this is your problem   Somewhere in MyGui java you re using a generic collection without specifying the type  For example if you re using an ArrayList somewhere  you are doing this   List list   new ArrayList      When you should be doing this   List lt String gt  list   new ArrayList lt String gt

[java] How do I compile with -Xlint:unchecked?

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