阿里云83行代码挑战赛 一道 单选题 给我整麻了

public class Type {

    public enum TypeEnum {
        ZERO,
        ONE
    }

    private TypeEnum type;

    public TypeEnum getType() {
        return type;
    }

    public void setType(TypeEnum type) {
        this.type = type;
    }

    public String getTypeString() {
        switch (type) {
            case ZERO:
                return "ZERO";
            case ONE:
                return "ONE";
            default:
                return "OTHER";
        }
    }
}

public class Type {

    private String type;

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getTypeString() {
        switch (type) {
            case "0":
                return "ZERO";
            case "1":
                return "ONE";
            default:
                return "OTHER";
        }
    }
}

public class Type {

    private int type;

    public int getType() {
        return type;
    }

    public void setType(int type) {
        this.type = type;
    }

    public String getTypeString() {
        switch (type) {
            case 0:
                return "ZERO";
            case 1:
                return "ONE";
            default:
                return "OTHER";
        }
    }
}

public class Type {

    private Integer type;

    public Integer getType() {
        return type;
    }

    public void setType(Integer type) {
        this.type = type;
    }

    public String getTypeString() {
        switch (type) {
            case 0:
                return "ZERO";
            case 1:
                return "ONE";
            default:
                return "OTHER";
        }
    }
}

结果答案是 B 不知道你是否对了~

switch语句 在 java7版本后支持 String类型，目前是不支持 浮点 和 long等表达式…

不知道看到这里你是否已经能解题了…

我们直接看阿里官方的提供的解释吧…