#vulnerable code 
                             public void init() {
		defaultFilterVariable = "$" + filterVariable;
		defaultFormatterVariable = "$" + formatterVariable;
		if (importVariables != null && importVariables.length > 0) {
			this.importTypes = new HashMap<String, Class<?>>();
			for (String var : importVariables) {
				int i = var.lastIndexOf(' ');
				if (i < 0) {
					throw new IllegalArgumentException("Illegal config import.setVariables");
				}
				this.importTypes.put(var.substring(i + 1), ClassUtils.forName(importPackages, var.substring(0, i)));
			}
		}
		if (importMethods != null && importMethods.length > 0) {
			for (String method : importMethods) {
				Class<?> cls = ClassUtils.forName(importPackages, method);
				Object ins;
				try {
					ins = cls.newInstance();
				} catch (Exception e) {
					ins = cls;
				}
				this.functions.put(cls, ins);
			}
		}
	} 
                            #location 19 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             public void init() {
		defaultFilterVariable = "$" + filterVariable;
		defaultFormatterVariable = "$" + formatterVariable;
		if (importVariables != null && importVariables.length > 0) {
			this.importTypes = new HashMap<String, Class<?>>();
			for (String var : importVariables) {
				int i = var.lastIndexOf(' ');
				if (i < 0) {
					throw new IllegalArgumentException("Illegal config import.setVariables");
				}
				this.importTypes.put(var.substring(i + 1), ClassUtils.forName(importPackages, var.substring(0, i)));
			}
		}
	}