一个好用的JAVA工具类 - 条件执行

不喜欢写if语句的看过来

/**
 * if 语句
 * @author Cpz
 * @since 2022-07-30
 */
public final class TrueOptional {

    private boolean flag;

    public static TrueOptional of(Boolean flag) {
        TrueOptional trueOptional = new TrueOptional();
        trueOptional.flag = Boolean.TRUE.equals(flag);
        return trueOptional;
    }

    public void then(Execute execute) {
        if (flag) {
            execute.apply();
        }
    }

    @FunctionalInterface
    public interface Execute {
        void apply();
    }

    public static void main(String[] args) {
        Boolean flag = null;
        TrueOptional.of(true).then(() -> System.out.println("true ...."));
        TrueOptional.of(false).then(() -> System.out.println("false ...."));
        TrueOptional.of(null).then(() -> System.out.println("null ...."));
        if (flag) { System.out.println("NPE");}
    }

}