数据类型扩展
public class Demo01 {
public static void main(String[] args) {
int a=10;
int b=010;
int c=0x10;
System.out.println(a);
System.out.println(b);
System.out.println(c);
System.out.println("==================================================================");
float d=0.1f;
double e=1.0/10;
System.out.println(d==e);
System.out.println(d);
System.out.println(e);
float f=233123231232132f;
float g=f+1;
System.out.println(f==g);
System.out.println("==================================================================");
char c1='a';
char c2='中';
System.out.println(c1);
System.out.println((int)c1);
System.out.println(c2);
System.out.println((int)c2);
char c3='\u0061';
System.out.println(c3);
System.out.println("hello\twrold");
System.out.println("==================================================================");
String sa = new String("hello world");
String sb = new String("hello world");
String sc = "hello world";
String sd = "hello world";
System.out.println(sa==sb);
System.out.println(sc==sd);
boolean flag=true;
if(flag==true){
;
}
if(flag){
;
}
}
}