public class BuildRange{
	
	public static void main(String[] args) {
		try {
			int[] i = buildInt("2,3,4,6");
			for(int s: i){
				System.out.println(s);
			}
			
			float[] f = buildFloat("-200,-60,20,300");
			for(float s: f){
				System.out.println(s);
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	/*
	 * 将字串转为数值分段处理，供它处调用查找目标值所在区间
	 * 如："-200,-60,20,300" 转换为 { -∞,-200,-60,20,300,∞ }
	 * 依类型不同分为int和float两个方法
	 * 代码删至最简可用
	 */
	
	// for Int
	public static int[] buildInt(String strInt){
		String[] strs = strInt.split(",");
		int[] rtnI = new int[strs.length+2];
		for(int i=1;i<rtnI.length-1;i++){
			rtnI[i] = Integer.parseInt(strs[i-1]);
		}
		rtnI[0] = Integer.MIN_VALUE;
		rtnI[rtnI.length-1] = Integer.MAX_VALUE;
		return rtnI;
	}

	// for Float
	public static float[] buildFloat(String strFloat){
		String[] strs = strFloat.split(",");
		float[] rtnF = new float[strs.length+2];
		for(int i=1;i<rtnF.length-1;i++){
			rtnF[i] = Float.parseFloat(strs[i-1]);
		}
		rtnF[0] = Float.MIN_VALUE;
		rtnF[rtnF.length-1] = Float.MAX_VALUE;
		return rtnF;
	}
	
}