Bug 82940 [quick fix] Missing sensible conversion suggestion
For this code > % cat Test.java import java.util.Collections; import java.util.List; public class Test { interface Wrapper { int doit(); } private static final List<Wrapper> STD_WRAPPERS = Collections.singletonList ((Wrapper)new Wrapper() { public int doit() { return 0; } }); private static final List<Wrapper> STD_WRAPPERS2 = Collections.singletonList (new Wrapper() { public int doit() { return 0; } }); } The value passed Collections.singletonList is actually of the right type so a sensible conversion would be to put in the cast (see the difference between the 2 statics). The current quick fixes offered assume the type being assigned to is wrong (when infact it is right). A useful quick fix would be to cast the parameter to the right type to give the left type (this would help with any 1 arg method of the form X<T> method(T)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/MissingReturnTypeCorrectionProposal.java
private static final String RETURN_EXPRESSION_KEY= "value"; 
	private MethodDeclaration fMethodDecl;
	private ReturnStatement fExistingReturn;
	public MissingReturnTypeCorrectionProposal(ICompilationUnit cu, MethodDeclaration decl, ReturnStatement existingReturn, int relevance) {
		super("", cu, null, relevance, JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CHANGE)); 
		fMethodDecl= decl;
		fExistingReturn= existingReturn;
	}
	public String getDisplayString() {
		if (fExistingReturn != null) {
			return CorrectionMessages.MissingReturnTypeCorrectionProposal_changereturnstatement_description;
		} else {
			return CorrectionMessages.MissingReturnTypeCorrectionProposal_addreturnstatement_description;
		}
	}
	/*(non-Javadoc)
	 * @see org.eclipse.jdt.internal.ui.text.correction.ASTRewriteCorrectionProposal#getRewrite()
	 */
	protected ASTRewrite getRewrite() {
		AST ast= fMethodDecl.getAST();