如何使数字时钟显示只有几小时和几分钟(how to make digital clock display only hours and minutes)

 首先，你创建一个Random对象，这很好！ 
 
    Random randGen = new Random();
 
 但你永远不会使用它。 相反，你调用randGen，你定义的功能 
 
    for(int i = 0; i < 3; i++) {
        x[i] = randGen(curWidth);
        y[i] = randGen(curHeight);
    }
 
 但randGen定义为始终返回0！ 您应该擦除该方法，并在循环调用中 
 
    for(int i = 0; i < 3; i++) {
        x[i] = randGen.nextInt(curWidth);
        y[i] = randGen.nextInt(curHeight);
    }

First, you create a Random object, which is good!
 
    Random randGen = new Random();
 
But you never use it. Instead, you call randGen, a fuction you've defined
 
    for(int i = 0; i < 3; i++) {
        x[i] = randGen(curWidth);
        y[i] = randGen(curHeight);
    }
 
But randGen is defined to always return 0! You should erase that method, and in your loop call
 
    for(int i = 0; i < 3; i++) {
        x[i] = randGen.nextInt(curWidth);
        y[i] = randGen.nextInt(curHeight);
    }