JAVAÖÐÈçºÎÊäÈëÊý¾Ý - Java / Java SE

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Scanner sc = new Scanner(System.in);
System.out.println("ÇëÊäÈëÄÚÈÝ£º");
String str = sc.nextLine();
System.out.println("ÄúÊäÈëµÄÄÚÈÝΪ£º" + str);

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Java code:
String str;
int a;
BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
System.out.println("ÇëÊäÈëÒ»¸öÊý£º");
str=buf.readLine();
a=Integer.parseInt(str);
System.out.println("ÊäÈëµÄÊýΪ£º"+a);

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Java code
String str;
int a;
BufferedReader buf=new BufferedReader(new InputStreamReader(System.in));
System.out.println("ÇëÊäÈëÒ»¸öÊý£º");
str=buf.readLine();
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Java code:

package TestShuru;

import java.io.*;

public class TestShuru {
public static void main(String[] args) throws Exception{
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String str = "";
while((str = br.readLine())!=null){
Sy