顯示給定字符的ASCII值

Question

我編寫了一個基於Java Web的程序來顯示給定字符的ASCII值。 但它不能正常工作。 請幫助我。 這是我的代碼。 無需向數據庫添加字符。

主豆

public mainbean() {}

private String charTest;

public String getCharTest() {
    return charTest;
}

public void setCharTest(String charTest) {
    this.charTest = charTest;
}

public String DoDisplay() throws IOException {

    BufferedReader buff = new BufferedReader(new InputStreamReader(System.in));

   //  System.out.println("Enter the char:");
    // String str = buff.readLine();
    String str = buff.readLine();

     // for ( int i = 0; i < str.length(); ++i){
    int i = 0;
    char c = str.charAt(i);
    int j = (int) c;
    FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "ASCII OF" + c + "=" + j, ""));
    return null;
}

這是我的xhtml頁面

<h:head>
    <title>Complain System</title>
</h:head>

<h:body>
    <h:form id="form">
        <h:outputText value="name"/>
        <p:inputText value="#{mainbean.charTest}"/>
        <p:commandButton value="submit" ajax="false" action="#{mainbean.doDisplay()}"/>
    </h:form>
</h:body>

這是Ctrl頁

public class charCtrl {

    private EntityManager em;

    public static void add() throws IOException {
        BufferedReader buff = new BufferedReader(new InputStreamReader(System.in));
        String str = buff.readLine();
        int i = 0;
        char c = str.charAt(i);
        int j = (int) c;
        FacesContext.getCurrentInstance().addMessage(null, new FacesMessage(FacesMessage.SEVERITY_INFO, "ASCII OF" + c + "=" + j, ""));
    }
}

Answer 1

您可以嘗試1.）String.valueOf（ch）.codePointAt（0）; 2.）用int轉換字符

Answer 2

您可以將char轉換為int 。 所以：

int asciiVal = (int) yourChar;

樣例代碼：

char yourChar = 'a';
int asciiVal = (int) yourChar;
System.out.println("ASCII for " + yourChar + " is " + asciiVal);