Button[] CardCommand = new Button[] {"read"," 1","-1"," 10","-10","first","end"};

上面這一行是小弟的程式碼。 小弟試圖宣告一個CardCommand的Button陣列，並利用匿名陣列來宣告裡面的文字內容。這時候發生了下面的錯誤。

D:\Tomcat 4.1\webapps\JavaTest\applet>javac test2.java
test2.java:43: incompatible types
found   : java.lang.String
required: java.awt.Button
Button[] CardCommand = new Button[]{"read"," 1","-1"," 10","-10","first","end"};
                                    ^
test2.java:43: incompatible types
found   : java.lang.String
required: java.awt.Button
Button[] CardCommand = new Button[]{"read"," 1","-1"," 10","-10","first","end"};
                                           ^
test2.java:43: incompatible types
found   : java.lang.String
required: java.awt.Button
Button[] CardCommand = new Button[]{"read"," 1","-1"," 10","-10","first","end"};
                                                ^
test2.java:43: incompatible types
found   : java.lang.String
required: java.awt.Button
Button[] CardCommand = new Button[]{"read"," 1","-1"," 10","-10","first","end"};
                                                     ^
test2.java:43: incompatible types
found   : java.lang.String
required: java.awt.Button
Button[] CardCommand = new Button[]{"read"," 1","-1"," 10","-10","first","end"};
                                                           ^
test2.java:43: incompatible types
found   : java.lang.String
required: java.awt.Button
Button[] CardCommand = new Button[]{"read"," 1","-1"," 10","-10","first","end"};
                                                                 ^
test2.java:43: incompatible types
found   : java.lang.String
required: java.awt.Button
Button[] CardCommand = new Button[]{"read"," 1","-1"," 10","-10","first","end"};
                                                                         ^
7 errors    D:\Tomcat 4.1\webapps\JavaTest\applet>

請問一下小弟是哪邊犯錯呢？ 發表人 - warke 於 2004/11/16 14:42:20

JButton 雖有以string建構的方式,就不代表有如C++的隱性形態轉換機制 (其他類別.我想在java也是如此吧) 所以你的宣告要如下.

JButton btns[5];<---事實上是如同C  中的指標陣列
...
..
for(int i=0;i<5;i  ){
   btns[i]=new JButton("button" i); <---傳回Jbutton物件指標
}

在java的術語中,參考是C 的指標,而不是C 中的"參考"一辭

在小弟的印象中，初始化陣列的時候有兩種方式： 一個是neoart大大所說的：

Button[] btns = new Button[5];  //建立含有6個JButton參考變數的陣列。
for(int i=0;i<5;i  ){
   btns[i]=new Button("button" i);  //將新的Button指到i的索引位址。
}

另一個是建立匿名陣列：

int[] btns = new int[5];
btns = new int[]{1,2,3,4,5};

只是問題是，發生一件很奇怪的事情是說 當我用int來做匿名矩陣宣告時就不會發生錯誤。但是用Button時就會出錯>"<~~。真是機車的問題阿.... 另外，小弟發現到假設如果只是用int[]來做匿名矩陣宣告就不會發生錯誤。比較如下： 程式段一：

int[] btns = new int[5];
btns = new int[]{1,2,3,4,5};

可以 程式段二：

int[] btns;
btns = new int[]{1,2,3,4,5};

可以 但是若是用Button[]時就不行了說。 程式段三：

Button[] btns = new Button[5];  //建立含有6個JButton參考變數的陣列。
for(int i=0;i<5;i  ){
   btns[i]=new Button("button" i);  //將新的Button指到i的索引位址。
}

可以 程式段四：

Button[] btns;  //建立含有6個JButton參考變數的陣列。
for(int i=0;i<5;i  ){
   btns[i]=new Button("button" i);  //將新的Button指到i的索引位址。
}

不可以 請問一下為什麼會這樣呢？