jre.java

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package org.loon.framework.ide.test;
/**
 * <p>Title: LoonFramework</p>
 * <p>Description:</p>
 * <p>Copyright: Copyright (c) 2007</p>
 * <p>Company: LoonFramework</p>
 * @author chenpeng  
 * @email：[e-mail] 
 * @version 0.1
 */
public abstract class JRE {
	

	private static final int JAVA_14 = 1;
	private static final int JAVA_15 = 2;

	private static String javaVersion;
    private static final float majorJavaVersion = getMajorJavaVersion(System.getProperty("java.specification.version"));
    private static int tmpmajor=0;
	private static final float DEFAULT_JAVA_VERSION = 1.3f;
	static {
		javaVersion = System.getProperty("java.version");
	
		if (javaVersion.indexOf("1.4.") != -1) {
			tmpmajor = JAVA_14;
		}else if (javaVersion.indexOf("1.5.") != -1) {
			tmpmajor = JAVA_15;
		}
		
	}

	private static final float getMajorJavaVersion(String javaVersion) {
        try {
            return Float.parseFloat(javaVersion.substring(0, 3));
        } catch ( NumberFormatException e ){
            return DEFAULT_JAVA_VERSION;
        }
    }
	
	public static boolean isJDK13(){
		return majorJavaVersion >= DEFAULT_JAVA_VERSION;
	}
	
	public static boolean isJDK14() {
        return majorJavaVersion >= 1.4f;
    }

    public static boolean isJDK15() {
        return majorJavaVersion >= 1.5f;
    }

    public static boolean isSun() {
        return System.getProperty("java.vm.vendor").indexOf("Sun") != -1;
    }

    public static boolean isApple() {
        return System.getProperty("java.vm.vendor").indexOf("Apple") != -1;
    }

	public static String getJavaVersion() {
		return javaVersion;
	}

	
	public static int getMajorJavaVersion() {
		return tmpmajor;
	}

	
}