java如何将int转换为boolean [英] How java converts int to boolean

问题描述

当我转换时:

int B=1;
boolean A=B;

它给出了错误:类型不兼容

但是当我编写这段代码时:

But when I write this code:

int C=0;
boolean A=C==1;

给出错误 而如果我将C的值更改为1，则表示为true. 我不明白编译器的工作方式.

it gives false while if I change value of C to 1 it gives true. I don't understand how compiler is doing it.

推荐答案

int C=0;
boolean A=C==1;

编译器首先给C赋零.

Variable : C
Value    : 0

现在，Assignment语句，

Now The Assignment statement,

我们知道，赋值语句首先评估右侧部分，然后将其赋予左侧.

We know that the assignment statement evaluates the right part first and the gives it to the left.

右侧部分==> C == 1 在这里，这是一个表达式，其结果为true或false.在这种情况下，它为c is 0.

The right part ==> C == 1 Here, This is an expression which evaluates to true or false. In this case it is false as c is 0.

所以R.H.S是假的.

So the R.H.S is false.

现在将其分配给L.H.S，即A.

Now this gets assigned to the L.H.S which is A.

A = ( C == 1 ) ==> A = false

由于A是布尔值，所以这是正确的声明

As A is a boolean this is a right statement

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