如何更改一个java类中的变量，然后从第三个java类访问更改后的变量？

public class VariableClass {
    private int variable;

    public int getVariable() {
        return variable;
    }

    public void setVariable(int variable) {
        this.variable = variable;
    }
}

public class ChangeVariableClass {
    public static void main(String[] args) {
        VariableClass variableObj = new VariableClass();
        variableObj.setVariable(10);
    }
}

public class AccessVariableClass {
    public static void main(String[] args) {
        VariableClass variableObj = new VariableClass();
        int modifiedVariable = variableObj.getVariable();
        System.out.println("Modified variable value: " + modifiedVariable);
    }
}