最简单的一个例子 class Test{ public static void main(String[] args){ String aStr = args[0];//接受键盘输入的第一个值 String bStr = args[1];//接受键盘输入的第二个值 int a = Integer.parseInt(aStr); int b = Integer.parseInt(bStr); int sum = a + b; System.out.println(aStr + "+" + bStr + "=" + sum);
} }运行时输入你需要的两个值,值之间需要打空格 例如: java Test 1 2
接收十个数，输出最大 最小package testFile;import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader;public class MaxMin3 { /** * @param args * @throws IOException */ public static void main(String[] args) throws IOException { // TODO 自動生成されたメソッド・スタブ int i =1; int s[] = new int[10]; while(i<=10) { try { String k; switch(i) { case 1: k = i + "st"; case 2: k = i + "nd"; case 3: k = i + "rd"; default: k = i+ "th"; } System.out.println("Please input the "+k+" digit : "); BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); s[i-1] = Integer.parseInt(br.readLine()); } catch(IOException e){};
package testFile;import java.util.Arrays; import java.util.Scanner;public class MaxMin2 { public static void main(String[] args) { int[] a = new int[10]; for (int i = 0; i < 10; i++ ){ String k; switch(i+1) { case 1: k = i + 1 + "st"; break; case 2: k = i + 1 + "nd"; break; case 3: k = i + 1 + "rd"; break; case 10: k ="last"; break; default: k = i + 1 + "th"; } System.out.println("Please input the " + k +" digit:"); Scanner in = new Scanner(System.in); a[i] = in.nextInt(); // System.out.println(a[i]); }
Arrays.sort(a); for (int i = 0; i < 10 ; i++) { System.out.print(a[i] + "\t"); } System.out.println(); System.out.println("You've input the largest is " + a[9]); System.out.println("You've input the smallest is " + a[0]); }}
用BufferedReader必须得抛出异常吗?
我是做BS开发的.用javascript这样写: <script> function haha(){ var key1 = event.keyCode; alert(key1); } </script> <body onkeydown="haha()"> </body>
int er = 0; try { er = (int)System.in.read(); } catch (IOException e) { e.printStackTrace(); }
...
优于楼上的做法，这个scan可以直接提取送入的int，double和字符串等，结贴给分吧
System.out.println(Stdin.readLine());//输出输入的字符
api里面有详细的介绍 scanner 1.5以后才有
{
BufferedReader stdin=new BufferedReader(new InputStreamReader(System.in) );//in是标准输入
}
catch(){ }
class Test{
public static void main(String[] args){
String aStr = args[0];//接受键盘输入的第一个值
String bStr = args[1];//接受键盘输入的第二个值 int a = Integer.parseInt(aStr);
int b = Integer.parseInt(bStr);
int sum = a + b;
System.out.println(aStr + "+" + bStr + "=" + sum);
}
}运行时输入你需要的两个值,值之间需要打空格
例如:
java Test 1 2
import java.io.IOException;
import java.io.InputStreamReader;public class MaxMin3 { /**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
// TODO 自動生成されたメソッド・スタブ
int i =1;
int s[] = new int[10];
while(i<=10) {
try {
String k;
switch(i) {
case 1: k = i + "st";
case 2: k = i + "nd";
case 3: k = i + "rd";
default: k = i+ "th";
}
System.out.println("Please input the "+k+" digit : ");
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
s[i-1] = Integer.parseInt(br.readLine());
} catch(IOException e){};
for(int m = 0; m<s.length - 1; m++) {
if (s[m]>s[m+1]) {
s[m] = s[m] + s[m+1];
s[m+1] = s[m] - s[m+1];
s[m] = s[m] - s[m+1];
}
System.out.println(s[9]);
System.out.println(s[0]);
}
}
}}
import java.util.Scanner;public class MaxMin2 {
public static void main(String[] args) {
int[] a = new int[10];
for (int i = 0; i < 10; i++ ){
String k;
switch(i+1) {
case 1: k = i + 1 + "st"; break;
case 2: k = i + 1 + "nd"; break;
case 3: k = i + 1 + "rd"; break;
case 10: k ="last"; break;
default: k = i + 1 + "th";
}
System.out.println("Please input the " + k +" digit:");
Scanner in = new Scanner(System.in);
a[i] = in.nextInt();
// System.out.println(a[i]);
}
Arrays.sort(a);
for (int i = 0; i < 10 ; i++) {
System.out.print(a[i] + "\t");
}
System.out.println();
System.out.println("You've input the largest is " + a[9]);
System.out.println("You've input the smallest is " + a[0]);
}}
<script>
function haha(){
var key1 = event.keyCode;
alert(key1);
}
</script>
<body onkeydown="haha()">
</body>
try {
er = (int)System.in.read();
} catch (IOException e) {
e.printStackTrace();
}