Java will be a one-dimensional array of negative to positive

The one-dimensional array negative to positive

public class Demo {

	public static void main(String[] args) {
		double[] num=new double[] {12.0,-34.0,0.01,-7.38,0};
		int length=num.length;//提升性能
		for(int i=0;i<length;i++) {
			if(num[i]<0) {
				num[i]=0-num[i];
			}
			System.out.println(num[i]);
		}
		
	}
}

 The results are as follows