[英]java how to change this code from finding all true objects to find false
I have code that finds all the objects in the list that are true to getranonelectricity and prints them out. 我有代码可以找到列表中对getranonelectricity正确的所有对象并将其打印出来。 How do I change this code so it finds and prints out only false ranonelectricity objects?
我如何更改此代码,以便它仅查找并打印出错误的ranonelectricity对象?
Transport transports[]=new Transport[10];
transports[0]=Transport1;
transports[1]=Transport2;
transports[2]=Transport3;
transports[3]=Transport3;
transports[4]=Transport4;
transports[5]=Transport5;
transports[6]=Transport6;
transports[7]=Transport7;
transports[8]=Transport8;
transports[9]=Transport9;
for (Transport transportssssss : transports) {
if (transportssssss instanceof car) {
if (((car) transportssssss).getranonelectricity()) {
System.out.println(transportssssss);
Change 更改
if(((car) transportssssss).getranonelectricity()){
to 至
if(!((car) transportssssss).getranonelectricity()){
The !
!
operator will invert the truth value of any Boolean expression. 运算符将反转任何布尔表达式的真值。
Please read about Logical Operators in Java. 请阅读有关Java中的逻辑运算符的信息。 For example this: https://www.dummies.com/programming/java/logical-operators-in-java/
例如: https : //www.dummies.com/programming/java/logical-operators-in-java/
You need a "Not" operator. 您需要一个“非”运算符。
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