刚接触java，帮忙写一段程序！

[coolwasp]

写一程序从键盘读入两个正整数，在屏幕上显示他们的和.

[bmlf]

用system.in来接收

[PublicJOE]

1+2=3

命令执行完毕
成功显示
继续+U

[bafce]

import java.io.*;
public class PrintOut
{
public static void main(String[] args)
{
long[] long_nums;
long long_sum;
PrintOut po=new PrintOut();
long_nums=po.readNums();
long_sum=po.add(long_nums);
System.out.println("运算结果为:");
System.out.println(long_nums[0]+" + "+ long_nums[1]+" = " + long_sum);
}
private long[] readNums()
{
long[] long_nums=new long[2];
String str_temp;
BufferedReader br;
for(int i=0;i<long_nums.length;i++)
{
System.out.println("请输入第"+(i+1)+"个数");
br=new BufferedReader(new InputStreamReader(System.in));
try
{
str_temp=br.readLine();
long_nums[i]=Integer.parseInt(str_temp);
}catch(IOException e)
{
System.err.println("Error");
}
}
return long_nums;
}
private long add(long[] long_nums)
{
return long_nums[0]+long_nums[1];
}

}

[yema55]

/* This program sums a list of numbers entered

by the user. It converts the string representation

of each number into an int using parseInt().
*/
import java.io.*;

class Sum {
public static void main(String args[])
throws IOException
{
// create a BufferedReader using System.in
BufferedReader br = new
BufferedReader(new InputStreamReader(System.in));
String str;
int i;
int sum=0;
System.out.println("Enter numbers, 0 to quit.");
do {
str = br.readLine();
try {
i = Integer.parseInt(str);
} catch(NumberFormatException e) {
System.out.println("Invalid format");
i = 0;
}
sum += i;
System.out.println("Current sum is: " + sum);
} while(i!= 0);
}
}