GenericMemoryCell类GenericMemoryCell <T>不能应用于给定类型

我想程序从方法readA()和readB()打印的回报，但我从main指出valueB需要String,String，因为我的构造GenericMemoryCell()的得到一个错误。但是，如果我需要通过构造函数接收和存储2个参数，我不需要发送2个参数给构造函数，如下所示？我怎么能只分配一个字符串到valueB？GenericMemoryCell类GenericMemoryCell <T>不能应用于给定类型

public class GenericMemoryCell<T>{ 

    public static void main(String[] args) { 
     GenericMemoryCell<String> valueA = new GenericMemoryCell<String>("1", "1"); 
     GenericMemoryCell<String> valueB = new GenericMemoryCell<String>("1"); 
     System.out.println("storedValueA: " + valueA.readA()); 
     System.out.println("storedValueB: " + valueB.readB()); 
    } 

    public GenericMemoryCell(T storedValueA, T storedValueB) 
    { this.storedValueA = storedValueA; this.storedValueB = storedValueB; writeA(storedValueA); writeB(storedValueB); } 

    public T readA() 
    { return storedValueA; } 

    public T readB() 
    { return storedValueB; } 

    private T storedValueA, storedValueB; 
}

来源

2016-05-31 mzeeirka

如果你想创建GenericMemoryCell路过你需要添加第二个构造带一个参数一个参数。

这里是一个PARAM构造函数只是调用两个PARAM构造函数，传递一个空的第二值的例子：

public GenericMemoryCell(T storedValueA, T storedValueB) { 
    ... 
} 

public GenericMemoryCell(T storedValueA) { 
    this(storedValueA, null); 
}

来源

2016-05-31 00:38:35 wero

这里是如何去创建一个只分配1字符串VALUEB更多构造函数与单个参数：

public GenericMemoryCell(T storedValueB) { 
    this.storedValueB = storedValueB;  
}

因此，现在您的类看起来如下所示。我编辑了几个地方来改进它。就像你的构造函数中有两个参数一样，不需要调用：writeA(storedValueA)和writeB(storedValueB)。

GenericMemoryCell.java

public class GenericMemoryCell<T> { 

    public static void main(String[] args) { 
     GenericMemoryCell<String> valueA = new GenericMemoryCell<String>("1", "2"); 
     GenericMemoryCell<String> valueB = new GenericMemoryCell<String>("3"); 
     System.out.println("valueA (A): " + valueA.readA()); 
     System.out.println("valueA (B): " + valueA.readB()); 
     System.out.println("valueB (A): " + valueB.readA()); 
     System.out.println("valueB (B): " + valueB.readB()); 
    } 

    public GenericMemoryCell(T storedValueA, T storedValueB) { 
     this.storedValueA = storedValueA; 
     this.storedValueB = storedValueB; 
    } 

    public GenericMemoryCell(T storedValueB) { 
     this.storedValueB = storedValueB; 
    } 

    public void writeB(T storedValueB) { 
     this.storedValueB = storedValueB; 

    } 

    public void writeA(T storedValueA) { 
     this.storedValueA = storedValueA; 

    } 

    public T readA() { 
     return storedValueA; 
    } 

    public T readB() { 
     return storedValueB; 
    } 

    private T storedValueA, storedValueB; 
}

来源

2016-05-31 01:12:50

GenericMemoryCell类GenericMemoryCell <T>不能应用于给定类型

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