java - found raw type: JComboBox -

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i have simple source file guiapp1.java trying compile cmd javac. gives me warning : 

c:\users\thakkar\java>javac guiapp1.java note: guiapp1.java uses unchecked or unsafe operations. note: recompile -xlint:unchecked details.

so used cmd javac -xlint guiapp1.java compile source file.

it gave me 6 warnings e.g.

guiapp1.java:48: warning: [rawtypes] found raw type: jcombobox         jcombobox fruits = new jcombobox(fruitoptions);         ^   missing type arguments generic class jcombobox<e>   e type-variable:     e extends object declared in class jcombobox

how can solve this?

starting java 7 many swing components use generics, older code produce warning raw types.

for combobox example can eliminate warning if provide type of objects holds e.g. should use jcombobox<string> fruits = new jcombobox<>(fruitoptions); if fruitoptions string[]. if use other type change accordingly.


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