簡介¶

• js callback function <=> lambda(FunctionalInterface)
• 回調函數
• 傳動作、傳方法

function javascriptCallback (a , callback){
    if(callback){
        callback();
    }
}

// Interface Function<T   ,R   >
// Interface Function<參數,返回值>
public Integer javaLamdba(Integer a ,java.util.Function<Integer,Integer> fun) {
    fun.apply(a);
}


Integer intReturnValue = javaLamdba(2 , param -> param * param );
Integer intReturnValue = javaLamdba(2 , param -> param + param );
Integer intReturnValue = javaLamdba(2 , param -> param / param );

內容¶

• Consumer，(unary function from T to void)
• Function，(unary function from T to R)
• Predicate，(unary function from T to boolean)
• Supplier，(nilary function to R)

Consumer¶

Function¶

Predicate¶

Supplier¶

參考資料¶