RxJava2 Flowable isEmpty 條件操作符

 

目錄

 

isEmpty

1 接口

2 圖解和說明

3 測試用例

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isEmpty

1 接口

Single<Boolean>

isEmpty() Returns a Single that emits true if the source Publisher is empty, otherwise false. 返回一個Single，如果源Publisher爲空，則返回true，否則返回false。

 

 

2 圖解和說明

 

 

3 測試用例

 @Test
    public void isEmpty() {
        System.out.println("######isEmpty#####");
        System.out.println("test 1");
        Flowable.empty().isEmpty().subscribe(new Consumer<Boolean>() {
            @Override
            public void accept(Boolean aBoolean) throws Exception {
                if(aBoolean) {
                    System.out.println("is empty");
                } else {
                    System.out.println("no empty");
                }
            }
        });

        System.out.println("test 2");
        Flowable.just(1).isEmpty().subscribe(new Consumer<Boolean>() {
            @Override
            public void accept(Boolean aBoolean) throws Exception {
                if(aBoolean) {
                    System.out.println("is empty");
                } else {
                    System.out.println("no empty");
                }
            }
        });


    }


######isEmpty#####
test 1
is empty
test 2
no empty

測試結果