private int data;
private String str;
public A(){
data = 0;
str = "";
}
public A(int data,String str){
this.data = data;
this.str = str;
}
public void add(int k,String s){
this.data+=k;
this.str+=s;
}
public void clear(){
this.data = 0;
this.str = "";
}
public String toString(){
String s = data+"";
s+=str;
return (s);
}
public static void main(String args[]){
A a = new A();
a.add(10,"Hello");
System.out.println("data is:"+a.data+" str is:"+a.str);
System.out.println(a.toString());
a.clear();
A b = new A(199,"nihao");
System.out.println("data is:"+b.data+" str is:"+b.str);
System.out.println(b.toString());
b.add(200, " dajiahao");System.out.println("data is:"+b.data+" str is:"+b.str);
System.out.println(b.toString());
}
}