System.out.println("BYTE MAX_VALUE = " + Byte.MAX_VALUE); 
System.out.println("BYTE MIN_VALUE = " + Byte.MIN_VALUE); 
System.out.println("SHORT MAX_VALUE = " + Short.MAX_VALUE);//3万多，5位 
System.out.println("SHORT MIN_VALUR = " + Short.MIN_VALUE); 
System.out.println("Int MAX_VALUE = " + Integer.MAX_VALUE);//21亿，10位 
System.out.println("Int MIN_VALUE = " + Integer.MIN_VALUE); 
System.out.println("LONG MAX_VALUE = " + Long.MAX_VALUE);//9.。。，19位 
System.out.println("LONG MIN_VALUR = " + Long.MIN_VALUE); 
System.out.println("FLOAT MAX_VALUE = " + Float.MAX_VALUE); 
System.out.println("FLOAT MIN_VALUE = " + Float.MIN_VALUE); 
System.out.println("DOUBLE MAX_VALUE = " + Double.MAX_VALUE); 
System.out.println("DOUBLE MIN_VALUR = " + Double.MIN_VALUE);