java练习本(2019-07-03)

public class Test {
   public static void main(String[] args) {
       int a =100,b = 50, c = a---b, d = a---b;
       System.out.print(a + "\t");
       System.out.print(b + "\t");
       System.out.print(c + "\t");
       System.out.print(d + "\t");
  }
}

public class Test {
   public static void main(String[] args) {
       Integer a = 1;
       Integer b = 1;
       Integer c = 233;
       Integer d = 233;
       System.out.print(a == b);
       System.out.print("\t");
       System.out.print(c == d);
  }
}