Sometimes I need to display a POJO’s properties/attributes. These POJOs may contain dozens of properties making it tedious to invoke all the
In the following example, the
getXxx()
methods. So Java Reflection is a perfect candidate for such a use case.In the following example, the
LoginResponse
class contains dozens of fields that I want to display. The formatMethodName()
method beautifies the getXxx()
method names into more human user friendly names.
import java.lang.reflect.Method; import com.laws.acc.ws.*; import com.laws.acc.model.*; LoginResponse loginResponse=AccSoapClientProxy.getLoginResponse(); void populateRows() { if(loginResponse!=null) { Method[] methods = LoginResponse.class.getDeclaredMethods(); for(int i=0; i<methods.length; i++) { Method method=methods[i]; //Object arglist[]={}; if(method.getName().startsWith("get")) { Row row=new Row(); Label label=new Label(formatMethodName(method.getName())); label.setStyle("font-style: italic;"); label.setParent(row); new Label(method.invoke(loginResponse, null).toString()).setParent(row); row.setParent(rows); } } } } /** * turn strings such as 'getUserName' into 'User Name' */ private String formatMethodName(String name) { // the method name should start with 'get' followed by the property name // otherwise, ignore the method. if(name==null || name.length()<4) return null; StringBuffer sb=new StringBuffer(); // skip the first 3 characters, they are 'get' for(int i=3; i<name.length(); i++) { char ch = name.charAt(i); if(i>3 && ch>='A' && ch<='Z') { sb.append(" "); } sb.append(ch); } return sb.toString().replace("Id", "ID").replace("Dt", "Timestamp").replace("Lre", "LRE").replace("Mvno", "MVNO"); }The GUI component I am using is a ZK Grid with each row showing a property value.
// put the above java code here. populateRows();
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