Create object instance from String and Class<?> - Android java.lang

Android examples for java.lang:Class

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Description

Create object instance from String and Class<?>

Demo Code

import java.lang.reflect.InvocationTargetException;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;

public class Main{

    public static Object fromString(String str, Class<?> clazz)
            throws Exception {
        Object o = null;/*from www .  j a v  a 2s  .c  om*/
        if (clazz.equals(String.class)) {
            o = str;
        } else if (clazz.equals(Integer.TYPE)
                || clazz.equals(Integer.class)) {
            o = Integer.parseInt(str);
        } else if (clazz.equals(Long.TYPE) || clazz.equals(Long.class)) {
            o = Long.parseLong(str);
        } else if (clazz.equals(Float.TYPE) || clazz.equals(Float.class)) {
            o = Float.parseFloat(str);
        } else if (clazz.equals(Double.TYPE) || clazz.equals(Double.class)) {
            o = Double.parseDouble(str);
        } else if (clazz.equals(Boolean.TYPE)
                || clazz.equals(Boolean.class)) {
            o = Boolean.parseBoolean(str);
        } else if (clazz.equals(Date.class)) {
            o = DATE_FORMAT.parse(str);
        } else if (clazz.equals(Byte.TYPE) || clazz.equals(Byte.class)) {
            o = Byte.parseByte(str);
        } else if (clazz.equals(Short.TYPE) || clazz.equals(Short.class)) {
            o = Short.parseShort(str);
        } else {
            o = clazz.getConstructor(String.class).newInstance(str);
        }
        return o;
    }

}

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