## Java Brush Questions Interview Series Exercises (8)

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# foreword

The blogger accidentally brushed the question and found this very good website`Niuke.com`, went in and brushed it, and found`Very broad coverage`, not only`Big factory interview questions`,and also`Xiaobai's introductory algorithm questions`, which is very friendly to people who have just come into contact with computer languages, so the blogger decided to open a column, which is recorded in detail in`Explanation of the idea of ​​brushing questions on Niuke.com`, let's follow the bloggers into the door of the algorithm!
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# Java Question Practice

## ⭕ Topic 1: Character to ASCII code

### 🌟 Code demo

``````import  java . useless _ Scanners ;

public class Main {
public static void main(String[] args){
Scanner in = new Scanner(System.in);
char a = in.next().charAt(0);
int num = a;
System.out.println(num);
}
}
``````
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### 💯Analysis of ideas

``````       The idea of ​​​​this topic is: "Enter the character type, then convert it to int type, and implicit conversion from small to large"
``````
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## ⭕ Topic 2: Implement rounding

### 🌟 Code demo

``````import  java . useless _ Scanners ;

public class Main{
public static void main(String[] args){
Scanner sc=new Scanner(System.in);
float f=sc.nextFloat();
System.out.print(Math.round(f));
}
}
``````
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### 💯Analysis of ideas

``````       The idea of ​​​​this topic is: "Enter a floating point number and call the round method in the Math class"
``````
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## ⭕Question 3: Score input and output

### 🌟 Code demo

``````import  java . useless _ Scanners ;

public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
int s1 = scanner.nextInt();
int s2 = scanner.nextInt();
int s3 = scanner.nextInt();
System.out.println("score1=" + s1 + "," + "score2=" + s2 + "," + "score3=" + s3);
}
}
``````
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### 💯Analysis of ideas

``````       The idea of ​​this topic is: "It's too easy"
``````
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## ⭕ Topic 4: Input and output of basic information of students

### 🌟 Code demo

``````import  java . useless _ Scanners ;

public class Main{
public static void main(String[] args){
Scanner sc=new Scanner(System.in);
String s=sc.nextLine();
String[] arr=s.split(";");
String[] scores=arr[1].split(",");
Double[] scores1=new Double[3];
for(int i=0;i<scores.length;i++)
scores1[i]=Double.parseDouble(scores[i]);
System.out.printf("The each subject score of No. %s is %.2f, %.2f, %.2f.",arr[0],scores1[0],scores1[1],scores1[2]);
}
}
``````
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### 💯Analysis of ideas

``````       The idea of ​​this topic is: "Just follow the topic"
``````
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## ⭕ Topic 5: Input and output of date of birth

### 🌟 Code demo

``````import  java . useless _ Scanners ;

public class Main{
public static void main(String[] args){
Scanner sc=new Scanner(System.in);
String n=sc.next();
String y=n.substring(0,4),m=n.substring(4,6),d=n.substring(6);
System.out.printf("year=%s\nmonth=%s\ndate=%s",y,m,d);
}
}
``````
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### 💯Analysis of ideas

``````       The idea of ​​this topic is: "Use substring to intercept"
``````
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# ✍ Conclusion

`By brushing more questions, we can enter the big factory as soon as possible and consolidate the knowledge we have learned. See you in the next issue, and subscribe to the column to brush the questions so as not to get lost.`
👉Click to start free questioning and follow the blogger to the top 💪

# Author: KJ.JK

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#### Tags: Java Brush Questions Interview Series Exercises (8)

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