When compiling java code, an error message cannot be found.
Nov 22, 2019 pm 02:54 PM
When translating a piece of java code, it prompts "Error: symbol not found", as follows:
D:\practicejava>javac PrintArray.java
PrintArray.java:4: 錯誤: 找不到符號
System.out.println("Array number:" + Arrays.toString(testArr));
^
符號: 變量 Arrays
位置: 類 PrintArray
1 個錯誤The code is as follows:
public class InsertionSort{
public static void main(String args[]){
int testnumber[] = {7,6,4,9,2,1,3,5,8}; // 定義數(shù)組
for(int i=0; i<testnumber.length-1; i++){ //從第一個數(shù)組元素開始，挑出一個作為比較元素
for(int j=i+1; j>0; j--){ // 將被挑選元素的后一個與被
if(testnumber[j-1]<testnumber[j]) //將被選元素依次與之前的元素作比較，如果被選元素小，則交換位置，
否則跳出循環(huán)
break;
int temp = testnumber[j];
testnumber[j] = testnumber[j-1];
testnumber[j-1] = temp;
}
}
System.out.println("Sorting number:" + Arrays.toString(testnumber)); //打印數(shù)組
}
}The reason why this error is reported is that the Arrays class is used in the code but not referenced in the code. Just introduce it in the code, as follows:
import java.util.Arrays;
Summary:
Here is Arrays This class is an example. Similarly, when encountering such problems, first check whether the corresponding class has been introduced.
Recommended tutorial: Getting started with java development
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