从数组列表中返回某些值

Question

尝试只返回getUFFleet()中的引用(IW1、SS2)，但是它正在返回toString()的每个值。方法getUFFleet()和setupForces来自同一个类，而toString来自另一个类FYI。

public String getUFFleet()
    {
        System.out.println(ForceDetails.toString());
        
        return "No forces in UFF";
      
    }

private void setupForces()
    {
        ForceDetails.add(new starShip("IW1","Twisters",200,200,10,0,0,"No","Wing" +"\n"));
        ForceDetails.add(new starShip("SS2","Enterprise",300,200,0,10,20,"No","Starship"));
  
    }

   public String toString()
    {
        String s;
        s = "\nForce reference: " + FleetRef + "\nName: " + FullName +
            "\nActivation Fee: " + ActivationFee +"\nStrikers: "
            + Strikers + "\nLaser Canons: " + LaserCanon + "\nPhotonTorpedoes: "
            + PhotonTorpedoes + "\nStregth: "+ BattleStrength
            +"\nCloaking: " + Cloaking + "\nForce Type: " + ForceType +"\n";
        return s;
    }

Answer 1

你可以尝试循环槽：

public String getUFFleet(){
    ForceDetails.forEach((starShip data) -> {
        System.out.println(data.getFleetRef());
      }
    );

    return "No forces in UFF";
}

作为关于forEach循环的额外信息，请参见以下链接：Foreach loop in java for a custom object list