修改列表中对象的数据成员的文本

下面是班级

public class State implements Serializable {
    private static final long serialVersionUID = 1L;

    private Long id;
    private String stateCode;
    private String stateName;

    public State() {
    }

    public Long getId() {
        return this.id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getStateCode() {
        return this.stateCode;
    }

    public void setStateCode(String stateCode) {
        this.stateCode = stateCode;
    }

    public String getStateName() {
        return this.stateName;
    }

    public void setStateName(String stateName) {
        this.stateName = stateName;
    }        
}

List<State> stateLink

将列表中所有对象的stateName中的空格替换为破折号“-”的最佳方法是什么?