Question

java我怎么把输入的五个字符串连在一起输出出来

public static void main(String[] args){
Scanner input=new Scanner(System.in);
String char2;
for(int i=1;i<=5;i++){
System.out.println("请输入第"+i+"个字符串：");
String char1=input.next();
}
System.out.println("组合为");
}
}

Answer 1

package string;

import java.util.Scanner;

public class ConcatString {
	public static void main(String[] args) {
	System.out.println("请输入字符串1:");
	Scanner sc = new Scanner(System.in);
	String s0 = sc.nextLine();
	StringBuilder sb = new StringBuilder();
	sb.append(s0);
	System.out.println("请输入字符串2:");
	String s1 = sc.nextLine();
	sb.append(s1);
	System.out.println("请输入字符串3:");
	String s2 = sc.nextLine();
	sb.append(s2);
	System.out.println("请输入字符串4:");
	String s3 = sc.nextLine();
	sb.append(s3);
	System.out.println("请输入字符串5:");
	String s4 = sc.nextLine();
	sb.append(s4);
	System.out.println("最后输出结果："+sb.toString());
	
	}
}

输出结果：

Answer 2

你好，请参考

public static void main(String[] args) {
    Scanner input = new Scanner(System.in);
    //初始化char2
    String char2 = "";
    for (int i = 1; i <= 5; i++) {
        System.out.println("请输入第" + i + "个字符串：");
        String char1 = input.next();
        //加到char2
        char2 += char1;
    }
    //输出到char2
    System.out.println("组合为" + char2);
}

Answer 3

首先，你这么写可能不对的，JAVA索引应该是从0开始
public static void main(String[] args){
Scanner input=new Scanner(System.in);
String char2;
String result=“”;
for(int i=1;i<=5;i++){
System.out.println("请输入第"+i+"个字符串：");
String char1=input.next();
result=result+char1;
}
System.out.println("组合为"+result);
}
}

Answer 4

public static void main(String[] args) {
Scanner input = new Scanner(System. in );
String char2 = "";
for (int i = 1; i <= 5; i++) {
System.out.println("请输入第" + i + "个字符串：");
String char1 = input.next();
char2 += char1;
}
input.close();
System.out.println("组合为: " + char2);
}