如何配置 Eclipse / STS 自动完成以建议新语句的构造函数参数名称？

Question

My Eclipse/STS used to autocomplete a new statement with argument names from the original class constructor. For example, let's suppose I have a Sale class like this:

public class Sale {

    private Integer month;
    private Integer year;
    private String seller;
    private Integer items;
    private Double total;

    public Sale(Integer month, Integer year, String seller, Integer items, Double total) {
    ...

Then if I start writing a new statement, the autocomplete used to suggest me a constructor call using argument names:

Sale sale = new Sale(month, year, seller, items, total);

However, recently, the autocomplete is suggesting null , like this:

Sale sale = new Sale(null, null, null, null, null);

How to configure Eclipse / STS autocomplete to suggest constructor argument names for new statements?

Answer 1

There are two strategies that can be used by the editor to propose arguments for method or constructor calls:

• best guessed arguments (this tries to find the best matching name in your scope that fits the type - but if there is no reference around in the scope where your new statement is, it inserts null since the editor can't find a anything that is matching)

• parameter names (this inserts the names of the parameters, independent of what is available in the scope of the new statement, sounds like this is what you are looking for)

You can switch between both options in Preferences -> Java -> Editor -> Content Assist and look for the choice below Fill method arguments and show guessed arguments .