public class erjinzhi
{
   public static void main(String[] args);
   
     int binVall = 0b11010100;
    long binVal2 = 0B1101001;
    int binVal3 = 0B10000000000000000000000000000011;
    {

    System.out.println(binVall);
     System.out.println(binVal2);
     System.out.println(binVal3);
     }

cmd执行 javac erjinzhi.java
报错 erjinzhi.java:3:错误缺少方法主体，或声明抽象
     public static void main (String[] args);

public class erjinzhi
{
   public static void main(String[] args){//;
    
     int binVall = 0b11010100;
    long binVal2 = 0B1101001;
    int binVal3 = 0B10000000000000000000000000000011;
    //{

    System.out.println(binVall);
     System.out.println(binVal2);
     System.out.println(binVal3);
     }
}

这很明显是第二行代码即主方法最后应该是大括号 {，而不是分号；