在Java中读取字符串(Reading String in java)

 我一直在为学校编写这个代码来创建课程，用户，学生和老师，但是我在创建课程时遇到了一些障碍。 
 
 我想要做的是（在终端中）读取输入流，例如“CSC 110 Into to java”，并将其全部输入到字符串中。 我正在使用扫描仪进行输入。 并在next（）之后尝试了hasNext（）和nextLine（）。 我想写一个函数来使用char数组获取整个字符串，然后将char数组转换为字符串。 
 
 首先我想知道是否有更简单的解决方案？ 
 
 编辑：对不起，我不清楚。 没有进入我的所有代码。 
 
 目前代码： 
 
        System.out.print("Enter the Course Title: ");
        title = keyboard.nextLine();
        System.out.print("Enter a Brief Course Description: ");
        desc = keyboard.nextLine();

        if (t != null)
        {   
            do
            {
                System.out.println("\nPick a teacher\n");

                for (int j = 0; j < t.size(); j++)
                {
                    nTeacher = t.get(j);
                    s += "\t(" + (j+1) + ") " + nTeacher + "\n";
                }

                System.out.print(s + "\nEnter the Teacher ID: ");
                int tId = keyboard.nextInt(); // My error
 
 当前错误： 
 
Enter the Course Title: CSC 110 Into to java

Enter a Breif Course Description: 
Pick a teacher

Enter the Teacher ID: 
Exception in thread "main" java.util.InputMismatchException
    at java.util.Scanner.throwFor(Scanner.java:857)
    at java.util.Scanner.next(Scanner.java:1478)
    at java.util.Scanner.nextInt(Scanner.java:2108)
    at java.util.Scanner.nextInt(Scanner.java:2067)
    at Prototype.classCreator(Prototype.java:530)
    at Prototype.mainMenu(Prototype.java:181)
    at Prototype.login(Prototype.java:121)
    at Prototype.main(Prototype.java:48)
 
 当我使用nextLine（） 
 
Create Class
Enter the courseID: 27222
Enter the Course Title: Enter a Brief Course Description: 
 
 预期结果： 
 
Create Class
Enter the courseID: 27299
Enter the Course Title: CSC 110 Into to Java
Enter a Brief Course Description: Introduction to programming
Pick a teacher
(1) ID: 1111    Name: Bob
Enter the Teacher ID: 1
Class Created
 
 我明白，当我有三个字符串“CSC 110 Intro”它得到nextInt（）的输入，但我不明白为什么nextLine（）正在写我的println是这样的。 

I've been working on this code for school to create a course, users, students, and teachers but I ran into a snag while creating a course.
 
What I want to do is (in the terminal) read an input stream such as "CSC 110 Into to java" and enter all of it into a string. I am using Scanner for input. and have tried hasNext() and nextLine() besides next(). I thought about writing a function to use a char array get the entire string and then convert the char array into a string. 
 
First I wanted to know if there was an easier solution?
 
Edit: Sorry I wasn't clear. Without going into all of my code.
 
current Code:
 
        System.out.print("Enter the Course Title: ");
        title = keyboard.nextLine();
        System.out.print("Enter a Brief Course Description: ");
        desc = keyboard.nextLine();

        if (t != null)
        {   
            do
            {
                System.out.println("\nPick a teacher\n");

                for (int j = 0; j < t.size(); j++)
                {
                    nTeacher = t.get(j);
                    s += "\t(" + (j+1) + ") " + nTeacher + "\n";
                }

                System.out.print(s + "\nEnter the Teacher ID: ");
                int tId = keyboard.nextInt(); // My error
 
Current error:
 
Enter the Course Title: CSC 110 Into to java

Enter a Breif Course Description: 
Pick a teacher

Enter the Teacher ID: 
Exception in thread "main" java.util.InputMismatchException
    at java.util.Scanner.throwFor(Scanner.java:857)
    at java.util.Scanner.next(Scanner.java:1478)
    at java.util.Scanner.nextInt(Scanner.java:2108)
    at java.util.Scanner.nextInt(Scanner.java:2067)
    at Prototype.classCreator(Prototype.java:530)
    at Prototype.mainMenu(Prototype.java:181)
    at Prototype.login(Prototype.java:121)
    at Prototype.main(Prototype.java:48)
 
When I use nextLine()
 
Create Class
Enter the courseID: 27222
Enter the Course Title: Enter a Brief Course Description: 
 
Intended result:
 
Create Class
Enter the courseID: 27299
Enter the Course Title: CSC 110 Into to Java
Enter a Brief Course Description: Introduction to programming
Pick a teacher
(1) ID: 1111    Name: Bob
Enter the Teacher ID: 1
Class Created
 
I understand that when I have three strings "CSC 110 Intro" it get to the input for nextInt() but I don't understand why nextLine() is writing my println's like this.

原文：https://stackoverflow.com/questions/5534704