String定义字符串,实际操作

package hello;

public class finallianxi {

public static void main(String[] args) {
String Strname = "一二三四";
System.out.println(Strname);
int a = 1;
System.out.println(a);
final double PEI = 3.14;
System.out.println(PEI);
String a1=("hello");
String a3=("world");
String a2=a1;
System.out.println(a1);
System.out.println(a2);

}

}