算数运算符
public class OperatorDemo 01{
     public static void mian {String []arge}{
  int a =6;
  int b =4;
  System. out. println (a +b );
  System. out. println (a -b );
  System. out. println (a *b );
  System. out. println (a /b );
  System. out. println (a %b );

  System. out. println (6.0/4);
}
}

字符的“+”操作
public class OperatorDemo 02{
  public static void main {String []arge }{
int i =10;
char c =“A “;
c =‘a ’;
c =‘0’;
System.out.println (j);

double d =10+13.14;
}
}

字符串的“+“操作
public class OperatorDemo 03{
   public static void main {String []arge}{
System.out.println (“it“+“heima“);
System.out.println(“itheima“+666);
System.out.println(666+“itheima“);
System.out.println (“黑马“+6+66);
System.out.println (1+99+“年黑马“);
}
}

自增自减运算符
public class OperatorDemo {
  public static void main (String []arge ){
   int i =10;
System. out.println (“i ：“+i );
  i ++
  System. out. println (“i ：“+i );
int j =++i;
System. out. println (“i ：“+i );
System. out. println (“i ：“+j );
}
}

逻辑运算符
public class OperatorDemo {
    public static void main (String []arge ){
   int i =10;
   int j =20;
  int k =30;
System.out.println((i>j)&(i>k));
System.out.println((i<j)&(i>k));
System.out.println((i>j)&(i<k));
System.out.println((i<j)&(i<k));

  
}
}