[英]Java | Classpath | Class not Found
所有代碼都是從父目錄執行的(我可以看到 bin 和 src)。
src/Spider.java:7: error: cannot find symbol
public class Spider extends Arachnid{
^
symbol: class Arachnid
1 error
error: compilation failed
課程:1. 蛛形綱動物
// Chapter 6: 6 /* This is a superclass */ public class Arachnid { /* * Constructor */ public Arachnid () { System.out.printf("%s%n%n", "Executing Arachnid constructor"); } public static void main(String[] args) { Arachnid a = new Arachnid(); // create Arachnid object } }
2.蜘蛛
// Chapter 6: 6 /* * This is a subclass - inherits all protected and public members from parent (field, methods, and nested classed) */ public class Spider extends Arachnid{ /* * Constructor */ public Spider () { System.out.printf("%s%n%n", "Executing Spider constructor"); } public static void main(String[] args) { Spider a = new Spider(); // create spider object } }
3. 花園蜘蛛
// Chapter 6: 6 /* This is a subclass */ public class GardenSpider extends Spider{ /* * Constructor */ public GardenSpider () { System.out.printf("%s%n%n", "Executing GardenSpider constructor"); } public static void main(String[] args) { GardenSpider gs = new GardenSpider(); // create garden spider object } }
編譯類
Executing Arachnid constructor
src/Spider.java:7: error: cannot find symbol public class Spider extends Arachnid{ ^ symbol: class Arachnid 1 error error: compilation failed
3. java -cp bin/Arachnid.class:bin/Spider.class:bin/GardenSpider.class src/GardenSpider.java
src/GardenSpider.java:6: error: cannot find symbol public class GardenSpider extends Spider{ ^ symbol: class Spider 1 error error: compilation failed
參考:
筆記:
bin/*
聲明類路徑時使用的簡寫選項 “找不到或加載主類”意味着找不到 class,或者 class 沒有帶有簽名的方法public static void main(String[])
我認為src/Arachnid.java
在這兩種情況下都是錯誤的。 你不執行.java源文件,你執行.class文件。 在您的情況下,它們位於/bin
目錄中。 嘗試類似:
java -cp bin/Arachnid.class:bin/Spider.class Spider
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