java - 使用 if 语句更改图像

Question

当程序加载时，已经有一个图像作为占位符

ImageIcon icon = new ImageIcon(Path + "Hangman1.jpg");   
JLabel label = new JLabel();
label.setIcon(icon);

现在我知道如何编写打印正文部分的 if 语句

if (guesses >= 1) System.out.print("HEAD ");
if (guesses >= 2) System.out.print("BODY ");
if (guesses >= 3) System.out.print("LEFT ARM ");
if (guesses >= 4) System.out.print("RIGHT ARM ");
if (guesses >= 5) System.out.print("LEFT LEG ");
if (guesses >= 6) System.out.print("RIGHT LEG ");

但是我不想使用普通的 System.out.print 来调出我的图像(想要改变图像)

Answer 1

类似的东西

String imageName = null;    

if (guesses >= 1) imageName = "Head.jpg";
if (guesses >= 2) imageName = "Body.jpg";
if (guesses >= 3) imageName = "LeftArm.jpg";
if (guesses >= 4) imageName = "RightArm.jpg";
if (guesses >= 5) imageName = "LeftLeg.jpg";
if (guesses >= 6) imageName = "RightLeg.jpg";

ImageIcon icon = null;
if (imageName != null) {
    icon = new ImageIcon(Path + File.seperator + imageName);
}

label.setIcon(icon);

显然，每个图像都需要相互叠加...

已更新

正如 PaulBellora 所指出的那样，前面的示例是最简单的代码更改，需要满足 OP 的要求，但这并不意味着它是正确的

switch (guesses) {
    case 1:
        imageName = "Head.jpg";
        break;
    case 2:
        imageName = "Body.jpg";
        break;
    case 3:
        imageName = "LeftArm.jpg";
        break;
    case 4:
        imageName = "RightArm.jpg";
        break;
    case 5:
        imageName = "LeftLeg.jpg";
        break;
    case 6:
        imageName = "RightLef.jpg";
        break;
}

会是一个稍微好一点的方法。

通过一点巧妙的布局管理，您可以改为使用六个标签，每个 body 部位一个...

// Global references to the body parts
public static final ImageIcon RIGHT_LEG_ICON = new ImageIcon(Path + File.seperator + "RightLeg.jpg");
public static final ImageIcon LEFT_LEG_ICON = new ImageIcon(Path + File.seperator + "LeftLeg.jpg");
public static final ImageIcon RIGHT_ARM_ICON = new ImageIcon(Path + File.seperator + "RightArm.jpg");
public static final ImageIcon LEFT_ARM_ICON = new ImageIcon(Path + File.seperator + "LeftArm.jpg");
public static final ImageIcon BODY_ICON = new ImageIcon(Path + File.seperator + "Body.jpg");
public static final ImageIcon HEAD_ICON = new ImageIcon(Path + File.seperator + "Head.jpg");

// Used as fillers to allow the layout manager to maintain the layout
public static final ImageIcon BLANK_LEG_ICON = new ImageIcon(Path + File.seperator + "BlankLeg.jpg");
public static final ImageIcon BLANK_ARM_ICON = new ImageIcon(Path + File.seperator + "BlankArm.jpg");
public static final ImageIcon BLANK_BODY_ICON = new ImageIcon(Path + File.seperator + "BlankBody.jpg");
public static final ImageIcon BLANK_HEAD_ICON = new ImageIcon(Path + File.seperator + "BlanHead.jpg");

...

// Setup the initial state...(probably in the constructor or when the game rests)
rightLegLabel.setIcon(BLANK_LEG_ICON);
leftLegLabel.setIcon(BLANK_LEG_ICON);
rightArmLabel.setIcon(BLANK_ARM_ICON);
leftArmLabel.setIcon(BLANK_ARM_ICON);
bodyLabel.setIcon(BLANK_BODY_ICON);
headLabel.setIcon(BLANK_BODY_ICON);

...

// As the guesses change...
switch (guesses) {
    case 6:
        rightLegLabel.setIcon(RIGHT_LEG_ICON);
    case 5:
        leftLegLabel.setIcon(LEFT_LEG_ICON);
    case 4:
        rightArmLabel.setIcon(RIGHT_ARM_ICON);
    case 3:
        leftArmLabel.setIcon(LEFT_ARM_ICON);
    case 2:
        bodyLabel.setIcon(BODY_ICON);
    case 1:
        headLabel.setIcon(HEAD_ICON);
}