Question

Java程序运行提示非法表达式的开始

public class OperatorDemo02{public static void main(String[]args){boolean b=false;int x=10;int y=-30;System.out.println("b="+b+",!b="+!b);System.out.println("x="+x+",-x="+-x);System.out.println("+y="+y+",+y="++y);}}

Answer 1

System.out.println("+y="+y+",+y="++y)
多了个+号