在Eclipse IDE中工作並且不在命令行中工作的代碼的相同集合

Question

在IDE中工作的代碼相同，但不在Cmd Line中工作。這是我的代碼。我找不到錯誤是什麼？

import java.util.*; 
import java.lang.*; 

public class AppendingBuffer{ 
    public static void main(String[] args){ 
     StringBuilder sb; 
     sb = new StringBuilder("abc"); 
     sb.append("def").reverse().insert(3, "---"); 
     System.out.println(sb); 
    } 
} 

這兩個屏幕截圖顯示了IDE和Cmd行程序。

錯誤在命令行：

E:\java\6>javac AppendingBuffer.java 
AppendingBuffer.java:7: error: constructor StringBuilder in class StringBuilder 
cannot be applied to given types; 
       sb = new StringBuilder("abc"); 
        ^
    required: no arguments 
    found: String 
    reason: actual and formal argument lists differ in length 
AppendingBuffer.java:8: error: cannot find symbol 
       sb.append("def").reverse().insert(3, "---"); 
       ^
    symbol: method append(String) 
    location: variable sb of type StringBuilder 
.\StringBuilder.java:5: error: constructor StringBuilder in class StringBuilder 
cannot be applied to given types; 
       StringBuilder sb = new StringBuilder("abc"); 
           ^
    required: no arguments 
    found: String 
    reason: actual and formal argument lists differ in length 
.\StringBuilder.java:6: error: cannot find symbol 
       sb.append("def").reverse().insert(3, "---"); 
       ^
    symbol: method append(String) 
    location: variable sb of type StringBuilder 
4 errors 

E:\java\6> 

Answer 1

那麼可能是你的類路徑上另一個類StringBuilder。重新編譯本地源文件或將其徹底刪除，然後再嘗試重新編譯它。