public class test1 { /**
* @param args
*/
public static void main(String[] args) {
// TODO 自动生成方法存根
String s1, s2;
s1 = “12.5”;
s2 = “10.5”;
double a, b,result;
a = Double.parseDouble(s1);
b = Double.parseDouble(s2);
result = a + b;
System.out.println(result);
* @param args
*/
public static void main(String[] args) {
// TODO 自动生成方法存根
String s1, s2;
s1 = “12.5”;
s2 = “10.5”;
double a, b,result;
a = Double.parseDouble(s1);
b = Double.parseDouble(s2);
result = a + b;
System.out.println(result);
s2 = “10.5”;
改成
s1 = "12.5";
s2 = "10.5";